| <!-- |
| Copyright 2020 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <!-- |
| This file is used to generate a comprehensive list of Blink histograms |
| along with a detailed description for each histogram. |
| |
| For best practices on writing histogram descriptions, see |
| https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md |
| |
| Please send CLs to chromium-metrics-reviews@google.com rather than to specific |
| individuals. These CLs will be automatically reassigned to a reviewer within |
| about 5 minutes. This approach helps the metrics team to load-balance incoming |
| reviews. Googlers can read more about this at go/gwsq-gerrit. |
| --> |
| |
| <histogram-configuration> |
| |
| <histograms> |
| |
| <histogram name="Blink.Accessibility.NumTreeUpdatesQueuedBeforeLayout" |
| units="updates" expires_after="M86"> |
| <owner>aboxhall@chromium.org</owner> |
| <owner>chrome-a11y-core@chromium.org</owner> |
| <summary> |
| Records how many tree updates were queued at the time updates are being |
| processed after layout. If we are trying to process too many updates at |
| once, we should investigate how we might be able to merge similar updates |
| without losing important information. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Animate.UpdateTime" units="microseconds" |
| expires_after="2021-05-23"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent processing main frame animations during a main frame update. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Animation.CompositedAnimationFailureReason" |
| enum="CompositorAnimationsFailureReason" expires_after="2021-06-20"> |
| <owner>smcgruer@chromium.org</owner> |
| <owner>animations-dev@chromium.org</owner> |
| <summary> |
| Reasons an Animation is not suitable for running on the compositor thread. |
| |
| Note that a given Animation may have more than one reason, so this histogram |
| cannot be used to determine the overall rate of 'composited' vs |
| 'noncomposited' animations. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.2DPrintingAsVector" enum="BooleanSuccess" |
| expires_after="2022-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <owner>juanmihd@chromium.org</owner> |
| <summary> |
| Records if a Canvas is being printed as a vector or as an image. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.ContentChangeMode" |
| enum="BooleanContentChangeMode" expires_after="2021-05-09"> |
| <owner>yiyix@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records whether the contents in the canvas buffer needed to be preserved via |
| a copy when replacing the target buffer for drawing a new frame. This metric |
| is recorded each time the target buffer needs to be replaced. It's recorded |
| once per frame. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.ContextType" enum="CanvasContextType" |
| expires_after="2021-06-06"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Records the context type names used to create canvas rendering contexts. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.CreateImageBitmapSource" |
| enum="CanvasCreateImageBitmapSource" expires_after="2022-04-04"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| The source from which an ImageBitmap is created by a createImageBitmap call. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.DrawImage.Duration" |
| units="microseconds" expires_after="2021-06-06"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Time spent on the main thread during a 2D canvas drawImage API call. |
| |
| Note: This metric drops reports on clients with low-resolution clocks, which |
| means these reports will be biased against a portion of the population on |
| Windows. See Windows.HasHighResolutionTimeTicks for the affected sample. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.DrawImage.SqrtNumberOfPixels" |
| units="sqrt(pixels)" expires_after="2021-06-06"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Stores the square root of the number of pixels drawn into a Canvas. |
| Different histograms per CanvasImageSource. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.GetImageDataScaledDuration" |
| units="microseconds * 10/sqrt(pixels)" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Time in microseconds * 10 (10e-5 seconds) spent on the 2D canvas |
| getImageData API call, divided by the square root of the total number of |
| pixels of the image extracted from the canvas. Smaller is faster. |
| |
| The idea behind this elaborated unit is that the bigger the area of a canvas |
| the longer the operation GetImageData takes, so we want a way to measure the |
| overall performance regardless of the size of the canvas. |
| |
| Warning: This metric may include reports from clients with low-resolution |
| clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports |
| will cause this metric to have an abnormal distribution. When considering |
| revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the |
| solution. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.GPUFallbackToCPU" |
| enum="CanvasGPUFallbackToCPUScenario" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <summary>Logs the occurrences of canvas fallback from GPU to CPU.</summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.HasRendered" enum="Boolean" |
| expires_after="2022-01-31"> |
| <owner>juanmihd@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records if the canvas has been rendered at least once. Recorded on disposal. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.HibernationEvents" enum="CanvasHibernationEvent" |
| expires_after="2021-04-04"> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records the occurrence of events related to 2D canvas GPU resource |
| hibernation. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.IsComposited" enum="Boolean" |
| expires_after="2021-01-31"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records if the canvas context is composited or not. Recorded in |
| HTMLCanvasElement::GetCanvasRenderingContext. |
| |
| Note: This has been recording bad data since at least 2020-01-01. It was |
| emitted in the wrong place and always recording false. Since it records the |
| same information as IsAccelerated, I am just going to let it expire. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.MaximumInflightResources" |
| units="canvas resources" expires_after="2021-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Reports the maximum number or canvas resources used at any one time by a |
| canvas resource provider. Logged in the destructor of |
| CanvasResourceProvider. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.NumCanvasesPerPage" units="canvases" |
| expires_after="2021-06-06"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| When a Document is shutdown, reports the number of canvases on that page. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.PutImageDataScaledDuration" |
| units="microseconds * 10/sqrt(pixels)" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Time in microseconds * 10 (10e-5 seconds) spent on the 2D canvas |
| putImageData API call, divided by the square root of the total number of |
| pixels of the imageData painted into the canvas. Smaller is faster. |
| |
| The idea behind this elaborated unit is that the bigger the area of a canvas |
| the longer the operation PutImageData takes, so we want a way to measure the |
| overall performance regardless of the size of the canvas. |
| |
| Warning: This metric may include reports from clients with low-resolution |
| clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports |
| will cause this metric to have an abnormal distribution. When considering |
| revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the |
| solution. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.RasterDuration" units="microseconds" |
| expires_after="2021-06-06"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records the CPU, GPU and combined raster time for a random sampling of |
| canvas frames for accelerated and deferred canvases. Records wall time for a |
| random sampling of unaccelerated canvases. |
| |
| Warning: This metric may include reports from clients with low-resolution |
| clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports |
| will cause this metric to have an abnormal distribution. When considering |
| revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the |
| solution. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.RequestedImageMimeTypes" |
| enum="RequestedImageMimeType" expires_after="2022-04-04"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Records the occurence of image file formats passed into toDataURL and toBlob |
| functions in canvas. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.ResourceProviderIsAccelerated" |
| enum="BooleanHardwareAccelerated" expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary>Logs if the canvas resource provider is accelerated or not.</summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.ResourceProviderType" |
| enum="CanvasResourceProviderType" expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary>Records the type of resource provider used for a canvas.</summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.ResourceProviderUsage" |
| enum="CanvasResourceProviderUsage" expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records the requested resource usage for a canvas resource provider. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.SqrtNumberOfPixels" units="sqrt(pixels)" |
| expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Stores the square root of the number of pixels in a new or resized offscreen |
| canvas. Emitted from CanvasRenderingContextHost::RecordCanvasSizeToUMA. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.ToBlob.CompleteEncodingDelay" |
| units="microseconds" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| This metric measures the total time spent on completing encoding all the |
| rows of an image (jpeg or png), as part of a canvas.toBlob API call. |
| Encoding occurs during one or more idle periods on the main thread and the |
| waiting time of the next idle period is included in the measurement. If the |
| code has swtiched to force encoding path, we will not measure the delay in |
| this metric. |
| |
| This metric is useful in helping us adjust the IdleTaskCompleteTimeoutDelay |
| in canvas.toBlob. When the encoding idle task is delayed for longer than |
| IdleTaskCompleteTimeoutDelay, the browser will switch to a non-idle task to |
| force encoding to happen on the main thread. |
| |
| In addition, metric values from OffscreenCanvas.convertToBlob API call are |
| also gathered into this histogram, because the logic flow is exactly the |
| same as canvas.toBlob. It's worth to note that the values can come from idle |
| tasks on either main or worker thread. |
| |
| Note: This metric drops reports on clients with low-resolution clocks, which |
| means these reports will be biased against a portion of the population on |
| Windows. See Windows.HasHighResolutionTimeTicks for the affected sample. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.ToBlob.IdleTaskStatus" |
| enum="IdleTaskStatus" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Records the status of the idle task when finishing a toBlob call. |
| |
| In addition, metric values from OffscreenCanvas.convertToBlob API call are |
| also gathered into this histogram, because the logic flow is exactly the |
| same as canvas.toBlob. It's worth to note that the values can come from idle |
| tasks on either main or worker thread. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.ToBlob.InitiateEncodingDelay" |
| units="microseconds" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| This metric measures the time spent from initiating image encoding (jpeg or |
| png) on idle task to the actual execution time of initiation, as part of a |
| canvas.toBlob API call. |
| |
| This metric is useful in helping us adjust the IdleTaskStartTimeoutDelay in |
| canvas.toBlob. When the initialization idle task is delayed for longer than |
| IdleTaskStartTimeoutDelay, the browser will switch to a non-idle task to |
| force initialization and encoding to occur on the main thread. |
| |
| In addition, metric values from OffscreenCanvas.convertToBlob API call are |
| also gathered into this histogram, because the logic flow is exactly the |
| same as canvas.toBlob. It's worth to note that the values can come from idle |
| tasks on either main or worker thread. |
| |
| Note: This metric drops reports on clients with low-resolution clocks, which |
| means these reports will be biased against a portion of the population on |
| Windows. See Windows.HasHighResolutionTimeTicks for the affected sample. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.ToBlob.ScaledDuration" |
| units="microseconds/sqrt(pixels)" expires_after="2022-04-04"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Time in microseconds spent on the 2D canvas toBlob API call, divided by the |
| square root of the total number of pixels of the canvas. |
| |
| In addition, metric values from OffscreenCanvas.convertToBlob API call are |
| also gathered into this histogram, because the logic flow is exactly the |
| same as canvas.toBlob. It's worth to note that the values can come from idle |
| tasks on either main or worker thread. |
| |
| Note: This metric drops reports on clients with low-resolution clocks, which |
| means these reports will be biased against a portion of the population on |
| Windows. See Windows.HasHighResolutionTimeTicks for the affected sample. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Canvas.ToDataURLScaledDuration" |
| units="microseconds/sqrt(pixels)" expires_after="2022-04-04"> |
| <owner>fserb@chromium.org</owner> |
| <owner>aaronhk@chromium.org</owner> |
| <summary> |
| Time spent on 2D canvas toDataURL API call divided by the square root of the |
| total number of pixels of the image. Smaller is faster. |
| |
| The idea behind this unit is that the bigger the area of a canvas the longer |
| the operation ToDataURL takes, so we want a way to measure the overall |
| performance regardless of the size of the canvas. |
| |
| Warning: This metric may include reports from clients with low-resolution |
| clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports |
| will cause this metric to have an abnormal distribution. When considering |
| revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the |
| solution. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Canvas.WillReadFrequently" |
| enum="BooleanWillReadFrequently" expires_after="2021-01-31"> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Logs if the canvas is initialized to be read frequently or not. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.ColorGamut.Destination" enum="Gamut" expires_after="M85"> |
| <owner>brianosman@chromium.org</owner> |
| <owner>mcasas@google.com</owner> |
| <owner>ccameron@chromium.org</owner> |
| <summary>Gamut properties of destination color space.</summary> |
| </histogram> |
| |
| <histogram name="Blink.ColorSpace.Destination" enum="Gamma" expires_after="M85"> |
| <owner>brianosman@chromium.org</owner> |
| <owner>mcasas@google.com</owner> |
| <owner>ccameron@chromium.org</owner> |
| <summary>Gamma properties of destination color space.</summary> |
| </histogram> |
| |
| <histogram name="Blink.ColorSpace.Destination.NonlinearFitErrorCombined" |
| units="units" expires_after="M85"> |
| <owner>brianosman@chromium.org</owner> |
| <owner>mcasas@google.com</owner> |
| <owner>ccameron@chromium.org</owner> |
| <summary> |
| The L-infinity error (in 8-bit values) of the numerical approximation of |
| table-based ICC profile transfer functions for all channels combined, when |
| the nonlinear approximation converged. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Compositing.LayerPromotionCount" |
| units="units" expires_after="2021-05-30"> |
| <owner>pdr@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Number of composited layers based on various reasons. Recorded when a page |
| finishes its layer updates. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.CompositingAssignments.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent updating compositing assignments in the Blink document lifecycle. |
| This is the legacy compositing approach. |
| |
| Note: this histogram has stopped recording metrics on machines with |
| low-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.CompositingCommit.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent updating and pushing layers at the end of the paint step in the |
| Blink document lifecycle. This is the new compositing approach in |
| CompositeAfterPaint and is largely implemented by PaintArtifactCompositor. |
| BlinkGenPropertyTrees is an incremental launch of part of the new |
| compositing approach and will use both this and |
| Blink.{CompositingInputs+CompositingAssignments}.UpdateTime. |
| |
| Note: As of M70, this histogram has stopped recording metrics on machines |
| with low-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.CompositingInputs.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent updating compositing inputs in the Blink document lifecycle. This |
| is the legacy compositing approach. |
| |
| Note: this histogram has stopped recording metrics on machines with |
| low-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Compression.CompressionStream.Format" |
| enum="CompressionStreamsFormat" expires_after="2021-01-24"> |
| <owner>ricea@chromium.org</owner> |
| <owner>yhirano@chromium.org</owner> |
| <summary> |
| Compression format passed to the constructor of the JavaScript API |
| "CompressionStream", which is used for lossless compression of |
| arbitrary binary data. Recorded once per call to the constructor. This |
| measures which compression formats are most commonly used in the wild. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Compression.DecompressionStream.Format" |
| enum="CompressionStreamsFormat" expires_after="2021-01-24"> |
| <owner>ricea@chromium.org</owner> |
| <owner>yhirano@chromium.org</owner> |
| <summary> |
| Compression format passed to the constructor of the JavaScript API |
| "DecompressionStream", which is used for lossless decompression of |
| arbitrary binary data. Recorded once per call to the constructor. This |
| measures which compression formats are most commonly used in the wild. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.CookieStore.MatchType" enum="CookieStoreMatchType" |
| expires_after="M87"> |
| <obsolete> |
| Removed in M87. |
| </obsolete> |
| <owner>ayui@chromium.org</owner> |
| <owner>pwnall@chromium.org</owner> |
| <summary> |
| Records match type option set by the developer for Cookie Store query APIs |
| to measure the usage of the option during Origin Trial to better evaluate |
| the best shape of the API. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.CSSPaintValue.PaintOffThread" |
| enum="BooleanCompositorCSSPaint" expires_after="2021-09-08"> |
| <owner>xidachen@chromium.org</owner> |
| <owner>smcgruer@chromium.org</owner> |
| <summary> |
| Records if a CSS Paint is painted on the compositor thread or has fallen |
| back to the main thread. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.DecodedImage.DensitySizeCorrectionDetected" |
| enum="BooleanPresent" expires_after="2021-01-03"> |
| <obsolete> |
| Removed in M89. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>noam.j.rosenthal@gmail.com</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Indicates whether a decoded image contains density correction metadata, i.e. |
| when its resolution and dimension EXIF values match. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.DecodedImage.JpegDensity.KiBWeighted" |
| units="0.01 bits per pixel" expires_after="2021-06-20"> |
| <owner>deymo@google.com</owner> |
| <owner>compression-dev@google.com</owner> |
| <summary> |
| The compressed image size in KiB per image density measured in 0.01 bits per |
| pixel. This is logged once per image load after the whole image is loaded |
| and only for JPEGs with at least 100 pixels on the smallest dimension (width |
| or height). The reported count for a sample represents the image size |
| rounded to the nearest KiB. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.DecodedImage.Orientation" enum="DecodedImageOrientation" |
| expires_after="M81"> |
| <obsolete> |
| Removed in M88. |
| </obsolete> |
| <owner>andrescj@chromium.org</owner> |
| <owner>rob.buis@samsung.org</owner> |
| <summary>Image orientation inferred during decode.</summary> |
| </histogram> |
| |
| <histogram name="Blink.DecodedImage.WebPFileFormat" enum="WebPFileFormat" |
| expires_after="2021-07-04"> |
| <owner>mcasas@chromium.org</owner> |
| <owner>andrescj@chromium.org</owner> |
| <summary> |
| WebP file format parsed during Blink's header parsing phase (which should |
| happen only once per image). |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.DecodedImageType" enum="DecodedImageType" |
| expires_after="2021-06-13"> |
| <owner>urvang@chromium.org</owner> |
| <summary>Image codec inferred during decode.</summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.DisplayLockIntersectionObserver.UpdateTime" |
| units="microseconds" expires_after="2021-06-06"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing IntersectionObserver observations in the Blink document |
| lifecycle where the observation is for Display Locking. Recorded when an |
| intersection observation is made for the Display Locking reason. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.EffectiveZoom" units="%" expires_after="2021-07-04"> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| The EffectiveZoom as reported by ComputedStyle in a Blink renderer. The |
| value is reported each time the effective zoom is set to a new value. The |
| maximum zoom reported is 400% to keep the histogram of reasonable size. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fetch.RequestResourceTime" units="microseconds" |
| expires_after="M82"> |
| <owner>csharrison@chromium.org</owner> |
| <summary> |
| The total microseconds spent in ResourceFetcher::requestResource. |
| |
| Warning: This metric may include reports from clients with low-resolution |
| clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports |
| will cause this metric to have an abnormal distribution. When considering |
| revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the |
| solution. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontLookupLoadFromFileTime" units="ms" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Records the duration it takes to load the font lookup table from file. |
| Reported when the font unique name lookup table is loaded at browser startup |
| on Android and loading was successful. The metric is not recorded when the |
| file did not exist or could not be parsed; use |
| Blink.Fonts.AndroidFontScanningLoadFromFileSuccess to determine how often |
| this metric is recorded. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontLookupTableReadyTime" units="ms" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Records the duration it takes from starting to prepare the font lookup table |
| until it is ready. Independent of whether it is loaded from file or whether |
| the fonts are scanned. Reported when the font unique name lookup table is |
| loaded at browser startup on Android. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontScanningLoadFromFileSuccess" |
| enum="BooleanSuccess" expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Counts the ratio of whether it was possible to load the font table from file |
| successfully or not. Reported when the font unique name lookup table is |
| loaded at browser startup on Android. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontScanningPersistToFileSuccess" |
| enum="BooleanSuccess" expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Counts the ratio of whether it was possible to store the font table to disk |
| after the metadata has been indexed. Reported on Android when the font |
| unique name lookup table is stored after indexing. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontScanningResult" |
| enum="FontScanningResult" expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Reports success or failure of extracting metadata from a single font file. |
| Reported when the font unique name lookup table is rebuilt on Android (i.e. |
| after a firmware update or first start with empty cache folder). |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontScanningTableBuildTime" units="ms" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Records duration of scanning available fonts for font name metadata, sorting |
| the list and making it available to renderers. Reported when the font unique |
| name lookup table is rebuilt on Android (i.e. after a firmware update or |
| first start with empty cache folder). |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.AndroidFontScanningUpdateNeeded" |
| enum="BooleanSuccess" expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Counts the ratio of whether it was necessary to rebuild the font table or |
| not. Reported when after the unique name lookup table is loaded from disk at |
| browser startup on Android. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.DataAccess.StreamCreation" enum="BooleanSuccess" |
| expires_after="2021-10-15"> |
| <owner>oyiptong@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <owner>storage-dev@chromium.org</owner> |
| <summary> |
| Counts success or failure in attempting to obtain font bytes as stream with |
| base address from Skia. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.Enumeration.Duration" units="ms" |
| expires_after="2021-10-15"> |
| <obsolete> |
| Removed in M89. Obsolete and unused. This has been replaced with |
| Fonts.AccessAPI.EnumerationCache.* |
| </obsolete> |
| <owner>oyiptong@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <owner>storage-dev@chromium.org</owner> |
| <summary> |
| Records duration of enumerating available fonts for font name metadata. |
| Reported on Mac platforms only, when the fonts are enumerated from the |
| system APIs if there is a cache miss. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.FontFamilyMatchAttempts.System" units="attempts" |
| expires_after="2021-12-20"> |
| <owner>caraitto@chromium.org</owner> |
| <owner>privacy-sandbox-dev@chromium.org</owner> |
| <summary> |
| Number of system font family match attempts made, from page load to page |
| unload. Recorded on page unload. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.ShapeCache" units="units" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Total number of entries in all Blink ShapeCache instances. The value is |
| reported each time the FontCache::purge() method is called. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.VariableFontsRatio" |
| enum="WebFontInstantiationResult" expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Tracks adoption ratio of variable fonts compared to conventional (in the |
| sense of non-variable) web fonts. Recorded at the time of instantiating a |
| Skia SkTypeface from the successfully decoded web font blob. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.WindowsUniqueLocalFontInstantiationResult" |
| enum="WindowsUniqueLocalFontInstantiationResult" expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Tracks whether a locally uniquely matched font can be instantiated inside |
| the renderer. Recorded at the time the renderer tries to instantiate the |
| font in the font cache. If it fails (in rare cases), it can either be caused |
| by the font being placed outside the Windows Fonts directory, or for an |
| unknown reason. Track this to identify whether a browser side helper is |
| needed to open the file handle outside the sandbox and pass it into the |
| renderer. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.WinFallback.LegacyNoneFound" units="units" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Tracks Blink Windows font fallback results while migrating to API based |
| fallback vs. the previous use of a hard-coded list. Records a data point |
| when the legacy hard-coded list code did not find fallback for a particular |
| Unicode code block ID (ICU::UBlockCode). Recorded at the time of Blink |
| layout code requesting a fallback font for a character and locale. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.WinFallback.LegacyWinAPIDisagree" units="units" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Tracks Blink Windows font fallback results while migrating to API based |
| fallback vs. the previous use of a hard-coded list. Records a data point |
| when the Windows API out of process fallback code and the legacy hard-coded |
| list fallback code disagree in fallback font result for a particular Unicode |
| code block ID (ICU::UBlockCode). Recorded at the time of Blink layout code |
| requesting a fallback font for a character and locale. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.WinFallback.NoFallbackFound" units="units" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Tracks Blink Windows font fallback results while migrating to API based |
| fallback vs. the previous use of a hard-coded list. Records a data point |
| when no fallback font result was found for a particular Unicode code block |
| ID (ICU::UBlockCode) through either the out-of-process Windows DWrite API or |
| the hard-coded list fallback code. Recorded at the time of Blink layout code |
| requesting a fallback font for a character and locale. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Fonts.WinFallback.WinAPINoneFound" units="units" |
| expires_after="2021-10-15"> |
| <owner>drott@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Tracks Blink Windows font fallback results while migrating to API based |
| fallback vs. the previous use of a hard-coded list. Records a data point |
| when the Windows API out of process fallback code did not find fallback for |
| a particular Unicode code block ID (ICU::UBlockCode). Recorded at the time |
| of Blink layout code requesting a fallback font for a character and locale. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.ForcedStyleAndLayout.UpdateTime" |
| units="microseconds" expires_after="2021-05-23"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing layouts due to Javascript value requests. Specifically, |
| time spent in Blink Document::UpdateStyleAndLayoutIgnorePendingStylesheets. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.HandleInputEvents.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent processing rAF-aligned input during a main frame update. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.HitTestDocumentUpdate.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent preparing the document for hit testing during a main frame |
| update. It does not compute the actual hit test time, rather the style, |
| layout, compositing, etc time to prepare for the test. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.ChunkCount" units="chunks" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| The number of chunks parsed while loading a page. Each chunk represents a |
| piece of the HTML content that can be loaded without blocking or yielding. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.ParsingTimeMax" units="microseconds" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the maximum time used to parse a single chunk before |
| being blocked, yielding or completing, in microseconds. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.ParsingTimeMin" units="microseconds" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the minimum time used to parse a single chunk before |
| being blocked, yielding or completing, in microseconds. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.ParsingTimeTotal" units="microseconds" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the total amount of time spent in the |
| HTMLDocumentParser performing parsing, in microseconds. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.TokensParsedAverage" units="tokens" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the average number of tokens parsed across all chunks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.TokensParsedMax" units="tokens" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the maximum number of tokens parsed as a chunk. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.TokensParsedMin" units="tokens" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the minimum number of tokens parsed as a chunk. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.YieldedTimeAverage" units="microseconds" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the average time between parsing of two chunks, in |
| microseconds. Will not be recorded if only one chunk was parsed. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.YieldedTimeMax" units="microseconds" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the maximum time between parsing of two chunks, in |
| microseconds. Will not be recorded if only one chunk was parsed. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.HTMLParsing.YieldedTimeMin" units="microseconds" |
| expires_after="2021-05-30"> |
| <owner>schenney@chromium.org</owner> |
| <owner>dom-dev@chromium.org</owner> |
| <summary> |
| While parsing a page, the minimum time between parsing of two chunks, in |
| microseconds. Will not be recorded if only one chunk was parsed. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.ImageDecoders.IncrementalDecodeNeeded" |
| enum="IncrementalDecodeNeeded" expires_after="2021-07-04"> |
| <owner>mbarowsky@chromium.org</owner> |
| <owner>andrescj@chromium.org</owner> |
| <summary> |
| For JPEG and WebP images, whether all image data has been received before |
| decoding begins or whether we are still receiving data and will need to send |
| partial image data to the decoder and pause/resume decoding until complete. |
| |
| It is emitted when the DeferredImageDecoder is about to create the first |
| DecodingImageGenerator for an image. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.ImageDecoders.IncrementallyDecodedByteSize" |
| units="bytes" expires_after="2021-07-11"> |
| <owner>mbarowsky@chromium.org</owner> |
| <owner>andrescj@chromium.org</owner> |
| <summary> |
| Images for which only partial image data has been received before decoding |
| begins. This may be because the image is very large or complex (less |
| compressed) or because of slow network or resource loading. More precisely, |
| the bucket in which the decode will be counted (IncrementallyDecoded or |
| InitiallyFullyDecoded) is computed when the DeferredImageDecoder is about to |
| create the first DecodingImageGenerator for an image and the byte size is |
| emitted when all data is received. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.ImageDecoders.InitiallyFullyDecodedByteSize" |
| units="bytes" expires_after="2021-06-13"> |
| <owner>mbarowsky@chromium.org</owner> |
| <owner>andrescj@chromium.org</owner> |
| <summary> |
| Images for which all image data has been received before decoding begins. |
| This may be because the image has a small file size (very compressed), |
| because of a fast network/resource loading connection, because the data was |
| preloaded with JavaScript, or because a decode was requested through |
| JavaScript IMG.decode() API, which must wait for all data to be received per |
| the specification. More precisely, the bucket in which the decode will be |
| counted (IncrementallyDecoded or InitiallyFullyDecoded) is computed when the |
| DeferredImageDecoder is about to create the first DecodingImageGenerator for |
| an image and the byte size is emitted when all data is received. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.ImageDecoders.Jpeg.Area" units="pixels" |
| expires_after="2021-02-28"> |
| <owner>andrescj@chromium.org</owner> |
| <summary> |
| Number of pixels in a decoded JPEG image. Recorded after decoding is done by |
| Blink's JPEG decoder (as opposed to, possibly, a hardware decode |
| accelerator). Tracking the image area may include degenerate cases, e.g., an |
| image with area = 10000 and dimensions = 1x10000. However, it is reasonable |
| to assume these cases are relatively rare and the area of the image can |
| serve as a proxy of how useful a decode accelerator can be (the larger the |
| area, the better). |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.ImageDecoders.Jpeg.ColorSpace" enum="JpegColorSpace" |
| expires_after="2021-06-13"> |
| <owner>andrescj@chromium.org</owner> |
| <owner>mcasas@chromium.org</owner> |
| <summary> |
| JPEG color space of a decoded image as guessed by libjpeg_turbo. Recorded |
| after decoding is done by Blink's JPEG decoder (as opposed to, possibly, a |
| hardware decode accelerator). When the color space is YCbCr, the chroma |
| subsampling is also recorded. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.ImplCompositorCommit.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent updating layers in the compositor thread during a |
| ProxyMain::BeginMainFrame. It is the actual work time, excluding time spent |
| waiting for the compositor thread to begin. |
| |
| Note: This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Input.GestureScrollBeginAsCursorControl" |
| enum="BooleanSuccess" expires_after="M89"> |
| <owner>ctzsm@chromium.org</owner> |
| <owner>changwan@chromium.org</owner> |
| <owner>input-dev@chromium.org</owner> |
| <summary>Records if a GestureScrollBegin is for cursor control.</summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.IntersectionObservation.UpdateTime" |
| units="microseconds" expires_after="2021-05-23"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing IntersectionObserver observations in the Blink document |
| lifecycle. |
| |
| Note: As of M70, this histogram has stopped recording metrics on machines |
| with low-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.JavascriptIntersectionObserver.UpdateTime" |
| units="microseconds" expires_after="2021-06-06"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing IntersectionObserver observations in the Blink document |
| lifecycle where the observation is due to a Javascript request. Recorded |
| when an intersection observation is made for the Javascript reason. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.KeyboardLock.MethodCalled" enum="KeyboardLockMethods" |
| expires_after="2021-03-31"> |
| <owner>joedow@chromium.org</owner> |
| <owner>garykac@chromium.org</owner> |
| <summary> |
| Records each call to the navigator.keyboard{Lock|Unlock} methods. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Layout.NGRatio.Blocks" units="%" |
| expires_after="2021-06-20"> |
| <owner>tkent@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Records LayoutNG ratio for the number of blocks. |
| |
| This records a percentage of LayoutNG-based blocks relative to all blocks. |
| This is recorded once per page on unloading the page. A value takes into |
| account of all frames in a single page. |
| |
| See https://bit.ly/ng-ratio for more details. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Layout.NGRatio.Calls" units="%" |
| expires_after="2021-06-20"> |
| <owner>tkent@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Records LayoutNG ratio for the number of UpdateLayout calls. |
| |
| This records a percentage of UpdateLayout() calls for LayoutNG-based objects |
| relative to all UpdateLayout() calls. This is recorded once per page on |
| unloading the page. A value takes into account of all frames in a single |
| page. |
| |
| See https://bit.ly/ng-ratio for more details. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Layout.UpdateTime" units="microseconds" |
| expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Time spent updating layout in the Blink document lifecycle. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.LazyLoad.CrossOriginFrames.InitialDeferralAction" |
| enum="LazyLoad.FrameInitialDeferralAction" expires_after="2021-03-07"> |
| <owner>sclittle@chromium.org</owner> |
| <summary> |
| Records the initial lazy loading action taken for a cross-origin iframe. |
| </summary> |
| </histogram> |
| |
| <histogram |
| name="Blink.LazyLoad.CrossOriginFrames.LoadStartedAfterBeingDeferred" |
| enum="NQEEffectiveConnectionType" expires_after="2021-02-21"> |
| <owner>sclittle@chromium.org</owner> |
| <summary> |
| Records the effective connection type whenever a lazily-loaded iframe that |
| wasn't initially hidden or near the viewport starts loading. The count for |
| an effective connection type in this histogram can be subtracted from the |
| 'Deferred' bucket from the |
| Blink.LazyLoad.CrossOriginFrames.InitialDeferralAction.* histogram for the |
| corresponding effective connection type to determine the number of iframes |
| that LazyLoad is avoiding to load altogether. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.LazyLoad.CrossOriginFrames.VisibleAfterBeingDeferred" |
| enum="NQEEffectiveConnectionType" expires_after="2021-02-21"> |
| <owner>sclittle@chromium.org</owner> |
| <summary> |
| Records the effective connection type whenever a lazily-loaded iframe that |
| wasn't initially hidden or near the viewport becomes visible. The count for |
| an effective connection type in this histogram can be subtracted from the |
| corresponding count in |
| Blink.LazyLoad.CrossOriginFrames.LoadStartedAfterBeingDeferred to determine |
| how many iframes were loaded unnecessarily by LazyLoad. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.LazyLoadIntersectionObserver.UpdateTime" |
| units="microseconds" expires_after="2021-06-06"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing IntersectionObserver observations in the Blink document |
| lifecycle where the observation is due to a Lazy Image Loading request. |
| Recorded when an intersection observation is made to determine when a lazy |
| loaded image should be loaded. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.AnimateRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing Main Frame animations and rAF callbacks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.CompositingAssignmentsRatio" |
| units="%" expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing compositing assignments. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.CompositingCommitRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for committing paint results to the compositor. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.CompositingInputsRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing compositing inputs. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.CompositingRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing Compositing. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.ForcedStyleAndLayoutRatio" |
| units="%" expires_after="2021-01-10"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The time between each paint results commit used in computing forced style |
| recalc and layouts for this document and ancestors as a percentage of the |
| Blink local frame lifecycle update time. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.HandleInputEventsRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for processing rAF aligned input. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.HitTestDocumentUpdateRatio" |
| units="%" expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for updating the document in preparation for hit testing. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.ImplCompositorCommitRatio" |
| units="%" expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for committing the layer tree to the impl thread, |
| excluding time spend waiting for the CC thread to begin processing. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.IntersectionObservationRatio" |
| units="%" expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing Intersection Observations. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.LayoutRatio" units="%" |
| expires_after="2021-03-21"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing Layout. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.PaintRatio" units="%" |
| expires_after="2021-03-21"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing Paint. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.PrePaintRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing PrePaint. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.ScrollingCoordinatorRatio" |
| units="%" expires_after="M88"> |
| <obsolete> |
| Merged into Blink.MainFrame.CompositingCommitRatio in |
| http://crrev.com/815947 in M88. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of the total BeginMainFrame execution time used for the |
| ScrollingCoordinator update in Blink, for each frame that we record. |
| Recorded in ScrollingCoordinator::UpdateAfterPaint. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.StyleRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is used for computing Style. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.UpdateLayersRatio" units="%" |
| expires_after="2021-03-21"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is spent in LayerTreeHost::UpdateLayers. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MainFrame.UpdateTime" units="microseconds" |
| expires_after="2021-06-20"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time between a BeginMainFrame and paint results commit in Blink. |
| |
| This histogram will not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MainFrame.WaitForCommitRatio" units="%" |
| expires_after="2020-11-08"> |
| <obsolete> |
| Removed M88 due to lack of use. |
| </obsolete> |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <!-- Name completed by histogram_suffixes name="BlinkMainFrameUpdateTimeSuffixes" --> |
| |
| <summary> |
| The percentage of time between a BeginMainFrame and paint results commit in |
| Blink that is spent waiting for the CC thread to begin processing. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.MediaIntersectionObserver.UpdateTime" |
| units="microseconds" expires_after="2021-06-06"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing IntersectionObserver observations in the Blink document |
| lifecycle where the observation is for a media element. Recorded when an |
| intersection observation is made attributed to a media element (such as |
| video auto-play). |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MemoryCache.RevalidationPolicy" |
| enum="RevalidationPolicy" expires_after="2021-04-21"> |
| <owner>hiroshige@chromium.org</owner> |
| <owner>loading-dev@chromium.org</owner> |
| <summary> |
| RevalidationPolicy used for non-preloading requests for each resource type. |
| https://crbug.com/579496 |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MemoryCache.RevalidationPolicy.AsyncScript" |
| enum="RevalidationPolicy" expires_after="2021-06-20"> |
| <owner>hiroshige@chromium.org</owner> |
| <owner>lizeb@chromium.org</owner> |
| <owner>loading-dev@chromium.org</owner> |
| <summary> |
| RevalidationPolicy used for non-preloading requests of async and defer |
| scripts. https://crbug.com/1043679 |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MemoryCache.RevalidationPolicy.Dead" |
| enum="RevalidationPolicy" expires_after="2021-04-21"> |
| <owner>hiroshige@chromium.org</owner> |
| <owner>loading-dev@chromium.org</owner> |
| <summary> |
| RevalidationPolicy used for requests that hit Resource only referenced from |
| MemoryCache for each resource type. https://crbug.com/579496 Requests |
| counted by this are also counted by Blink.MemoryCache.RevalidationPolicy or |
| Blink.MemoryCache.RevalidationPolicy.Preload. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MemoryCache.RevalidationPolicy.PerDocument" |
| enum="RevalidationPolicy" expires_after="2021-06-20"> |
| <owner>shivanisha@chromium.org</owner> |
| <owner>privacy-sandbox-dev@chromium.org</owner> |
| <summary> |
| RevalidationPolicy used for requests for each resource type. Logged only if |
| the resource is found in the memory cache and if the same document had |
| loaded this resource earlier. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite" |
| enum="RevalidationPolicy" expires_after="2021-06-20"> |
| <owner>shivanisha@chromium.org</owner> |
| <owner>privacy-sandbox-dev@chromium.org</owner> |
| <summary> |
| RevalidationPolicy used for requests for each resource type. Logged only if |
| the resource is found in the memory cache and if the same top-frame site had |
| loaded this resource earlier. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.MemoryCache.RevalidationPolicy.Preload" |
| enum="RevalidationPolicy" expires_after="2021-04-21"> |
| <owner>hiroshige@chromium.org</owner> |
| <owner>loading-dev@chromium.org</owner> |
| <summary> |
| RevalidationPolicy used for preloading requests for each resource type. |
| https://crbug.com/579496 |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.OffscreenCanvas.ContextType" enum="CanvasContextType" |
| expires_after="2021-06-13"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records the context type names used to create offscreen canvas rendering |
| contexts. Recorded in OffscreenCanvas::GetCanvasRenderingContext |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.OffscreenCanvas.NewOffscreenCanvas" enum="Boolean" |
| expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records the creation of a new offscreen canvas in OffscreenCanvas::Create. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.OffscreenCanvas.SqrtNumberOfPixels" units="sqrt(pixels)" |
| expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Stores the square root of the number of pixels in a new or resized offscreen |
| canvas. Emitted from CanvasRenderingContextHost::RecordCanvasSizeToUMA. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.OffscreenCanvas.TransferControlToOffscreen" |
| enum="BooleanSuccess" expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary>Records a call to transfer a canvas offscreen.</summary> |
| </histogram> |
| |
| <histogram name="Blink.OffscreenCanvas.Transferred" enum="Boolean" |
| expires_after="2022-04-04"> |
| <owner>aaronhk@chromium.org</owner> |
| <owner>fserb@chromium.org</owner> |
| <summary> |
| Records when an offscreen canvas has been transferred from the main thread |
| to a worker. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Paint.CachedItemPercentage" units="%" |
| expires_after="2021-03-01"> |
| <owner>wangxianzhu@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Percentage of cached display items among all display items. Higher value |
| means higher performance beause of less paint invalidation. Recorded when we |
| finish updating paint in the Blink document lifecycle. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Paint.CachedSubsequencePercentage" units="%" |
| expires_after="2021-03-01"> |
| <owner>wangxianzhu@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Percentage of cached subsequences of display items among all subsequences. |
| Higher value means higher performance beause of less subsequence |
| invalidation. Recorded when we finish updating paint in the Blink document |
| lifecycle. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Paint.UpdateTime" units="microseconds" |
| expires_after="2021-06-20"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent updating paint in the Blink document lifecycle. |
| |
| Note: As of M70, this histogram has stopped recording metrics on machines |
| with low-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.PrePaint.UpdateTime" units="microseconds" |
| expires_after="2021-06-27"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent updating paint properties and paint invalidation in the Blink |
| document lifecycle. Available when SlimmingPaintInvalidation or |
| SlimmingPaintV2 is enabled. |
| |
| Note: As of M70, this histogram has stopped recording metrics on machines |
| with low-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Render.DisplayLockActivationReason" |
| enum="DisplayLockActivationReason" expires_after="2021-05-23"> |
| <owner>vmpstr@chromium.org</owner> |
| <owner>chrishtr@chromium.org</owner> |
| <summary>This indicates the reason for display-locking activation</summary> |
| </histogram> |
| |
| <histogram name="Blink.ResourceFetcher.StaleWhileRevalidateDuration" units="ms" |
| expires_after="2020-04-05"> |
| <obsolete> |
| Removed 12/2020. |
| </obsolete> |
| <owner>dtapuska@chromium.org</owner> |
| <owner>kenjibaheux@google.com</owner> |
| <summary>Duration of completed stale revalidation attempts.</summary> |
| </histogram> |
| |
| <histogram name="Blink.ResourceLoadScheduler.TrafficBytes.KBPerFrameStatus" |
| enum="RendererSchedulerFrameType2" expires_after="2020-02-02"> |
| <owner>toyoshim@chromium.org</owner> |
| <owner>altimin@chromium.org</owner> |
| <summary> |
| Total encoded size of resources associated with frames of a particular type. |
| Recorded when a fetch has been completed. |
| |
| Each bucket of the histogram cointains the total size of all requests |
| associated with frames with a particular frame status in kilobytes. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.ScanPendingActivityDuration" units="ms" |
| expires_after="M85"> |
| <owner>haraken@chromium.org</owner> |
| <summary> |
| Duration of time taken to scan pending activities of all V8 wrappers in a |
| worker thread. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Script.AsyncScriptCount" units="count" |
| expires_after="2021-05-25"> |
| <owner>dom@chromium.org</owner> |
| <owner>chrome-loading@google.com</owner> |
| <summary> |
| The total number of async scripts associated with a document at the time |
| parsing has finished. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Script.ForceDeferredScripts.Mainframe" units="count" |
| expires_after="2021-05-02"> |
| <owner>dougarnett@chromium.org</owner> |
| <owner>hiroshige@chromium.org</owner> |
| <summary> |
| Number of synchronous scripts that were deferred for a mainframe by the |
| ForceDeferScriptIntervention. This includes both inline scripts and external |
| scripts that had their execution deferred until after parsing completes. |
| Recorded when there is at least one force deferred script for the frame. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Script.ForceDeferredScripts.Mainframe.External" |
| units="count" expires_after="2021-05-02"> |
| <owner>dougarnett@chromium.org</owner> |
| <owner>hiroshige@chromium.org</owner> |
| <summary> |
| Number of external synchronous scripts that were deferred for a mainframe by |
| the ForceDeferScriptIntervention. Recorded when there is at least one force |
| deferred script for the frame (not necessarily external). |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Script.ForceDeferredScripts.Subframe" units="count" |
| expires_after="2021-02-28"> |
| <owner>dougarnett@chromium.org</owner> |
| <owner>hiroshige@chromium.org</owner> |
| <summary> |
| Number of synchronous scripts that were deferred for a subframe by the |
| ForceDeferScriptIntervention. This includes both inline scripts and external |
| scripts that had their execution deferred until after parsing completes. |
| Recorded when there is at least one force deferred script for the frame. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Script.ForceDeferredScripts.Subframe.External" |
| units="count" expires_after="2021-02-28"> |
| <owner>dougarnett@chromium.org</owner> |
| <owner>hiroshige@chromium.org</owner> |
| <summary> |
| Number of external synchronous scripts that were deferred for a subframe by |
| the ForceDeferScriptIntervention. Recorded when there is at least one force |
| deferred script for the frame (not necessarily external). |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Script.SchedulingType" enum="ScriptSchedulingType" |
| expires_after="2021-07-11"> |
| <owner>kouhei@chromium.org</owner> |
| <owner>hiroshige@chromium.org</owner> |
| <summary> |
| Number of script elements for each scheduling type, recorded for each |
| successful #prepare-a-script. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.ScrollingCoordinator.UpdateTime" |
| units="microseconds" expires_after="M88"> |
| <obsolete> |
| Merged into Blink.CompositingCommit.UpdateTime in http://crrev.com/815947 in |
| M88. |
| </obsolete> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>pdr@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| The time it took to update scrolling coordinator data (scroll gesture |
| regions, touch event rects, and main thread scrolling reasons). These values |
| are calculated during the main-thread blink lifecycle. |
| |
| Warning: This metric may include reports from clients with low-resolution |
| clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports |
| will cause this metric to have an abnormal distribution. When considering |
| revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the |
| solution. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.BackendAvailability" |
| enum="WebOTPBackendAvailability" expires_after="M92"> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records how often the verification backend is unavailable for the WebOTP API |
| and the corresponding reason. This is recorded once per OTP request. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.PendingOriginCount" units="origins" |
| expires_after="M92"> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| SmsFetcher subscribes to incoming SMSes with origins from SmsProvider. This |
| metric records the number of pending origins that are not unsubscribed when |
| the SmsFetcher subscribes to new origins. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.DestroyedReason" |
| enum="WebOTPServiceDestroyedReason" expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the reason an SMS Service is destroyed before request completion. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.Infobar" enum="WebOTPServiceInfobarAction" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records how many times the infobar was called and how many times the infobar |
| replaced a keyboard. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.Outcome" enum="WebOTPServiceOutcome" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary>Records the result of a call to the WebOTP API.</summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.SmsParsingStatus" enum="SmsParsingStatus" |
| expires_after="M92"> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the status of parsing an incoming SMS when using the WebOTP API. It |
| records one sample per incoming SMS. |
| |
| Note: This metric does not cover cross-devices WebOTP. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeCancel" units="ms" expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the duration from when the API is called to when the request is |
| cancelled by the service due to duplicated requests or lack of delegate. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeCancelOnKeyboardDismissal" units="ms" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the duration from when the keyboard was replaced with an infobar |
| until when the user clicked the cancel button. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeCancelOnSuccess" units="ms" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the time from when a successful SMS was retrieved to when the user |
| presses the Cancel button. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeContinueOnSuccess" units="ms" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the time from when a successful SMS was retrieved to when the user |
| presses the Continue button. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeSmsReceive" units="ms" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the duration from when the API is called to when an SMS has been |
| successfully received. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeSuccess" units="ms" expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>reillyg@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the duration from when the API is called to when the user |
| successfully receives the SMS and presses continue to pass the incoming SMS |
| to the site and proceed with the SMS verification flow. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.Sms.Receive.TimeUserCancel" units="ms" |
| expires_after="M92"> |
| <owner>goto@chromium.org</owner> |
| <owner>yigu@chromium.org</owner> |
| <owner>web-identity@google.com</owner> |
| <summary> |
| Records the duration from when the API is called to when the user |
| successfully receives the SMS and presses "Deny" to terminate the |
| SMS verification flow. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.SpatialNavigation.Advance" units="microseconds" |
| expires_after="M85"> |
| <obsolete> |
| Expired in M85. |
| </obsolete> |
| <owner>bokan@chromium.org</owner> |
| <summary> |
| Time it takes to find best candidate element, set focus or scroll for given |
| directional input. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.Style.UpdateTime" units="microseconds" |
| expires_after="2021-05-23"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>layout-dev@chromium.org</owner> |
| <summary> |
| Time spent updating style in the Blink document lifecycle. |
| |
| This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.ThreadedIconLoader.LoadTime" units="ms" |
| expires_after="2021-11-30"> |
| <owner>nator@chromium.org</owner> |
| <owner>rayankans@chromium.org</owner> |
| <summary> |
| The number of milliseconds it took to finish successfully loading an icon |
| using ThreadedIconLoader. Recorded whenever a blink module loads an icon |
| using ThreadedIconLoader. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UpdateViewportIntersection.UpdateTime" |
| units="microseconds" expires_after="2021-03-21"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent computing geometry information about iframes from the perspective |
| of their embedding document. This time is also included in the |
| Blink.IntersectionObservation.UpdateTime metric. |
| |
| This histogram only records metrics on machines with high-resolution clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.AnimatedCSSProperties" |
| enum="MappedCSSProperties" expires_after="never"> |
| <!-- expires-never: used by Chrome Platform Status dashboard --> |
| |
| <!-- https://www.chromestatus.com/metrics/css/animated --> |
| |
| <owner>chasej@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Records usage of animated CSS properties used on a page, either statically |
| or dynamically, from the time the page is initialised to when it is closed |
| or navigated away from. Each property is counted at most once per page per |
| view via PageLoadMetricsObserver. |
| </summary> |
| <details> |
| This histogram counts CSS properties only when they are animated by a CSS |
| Animation. Refer to Blink.UseCounter.CSSProperties for more details. |
| |
| As of M69, Blink.UseCounter.AnimatedCSSProperties is moved from the blink |
| side to the browser side. |
| </details> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.CSSProperties" enum="MappedCSSProperties" |
| expires_after="never"> |
| <!-- expires-never: used by Chrome Platform Status dashboard --> |
| |
| <!-- https://www.chromestatus.com/metrics/css/animated --> |
| |
| <owner>chasej@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Records usage of CSS properties used on a page, either statically or |
| dynamically, from the time the page is initialised to when it is closed or |
| navigated away from. Each property is counted at most once per page per view |
| via PageLoadMetricsObserver. |
| </summary> |
| <details> |
| The first time a CSS property is parsed on a page, the histogram is updated |
| to increment the counter. Each histogram bucket corresponds to a CSS |
| property (eg. width, border-radius). The exception is the 'Total pages |
| measured' bucket - this counts the number of pages that CSS properties were |
| counted on. When a page navigation occurs the page count bucket is |
| incremented and tracking of the set of which properties have been seen is |
| reset. |
| |
| These numbers give the percentage of pages that use a CSS property. For |
| example, if the 'border-radius' histogram bucket has a count of 250, and the |
| page count bucket (i.e. bucket number 1) has a count of 1000 - this means |
| that 1000 pages were recorded, and border-radius was used on 25% of those |
| pages. |
| |
| Note that CSS properties used inside of SVG images are tracked separately in |
| the Blink.UseCounter.SVGImage.CSSProperties histogram. |
| |
| As of M57 this histogram supercedes WebCore.FeatureObserver.CSSProperties. |
| |
| As of M69, Blink.UseCounter.AnimatedCSSProperties is moved from the blink |
| side to the browser side. |
| </details> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.DocumentPolicy.Enforced" |
| enum="DocumentPolicyFeature" expires_after="2021-03-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts enforced DocumentPolicyViolationReport generated in a document. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.DocumentPolicy.Header" |
| enum="DocumentPolicyFeature" expires_after="2021-05-30"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts the use of a specific document policy via the |
| "Document-Policy" HTTP response header. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.DocumentPolicy.PolicyAttribute" |
| enum="DocumentPolicyFeature" expires_after="2021-03-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts the use of a specific document policy via the "policy" |
| attribute. Each policy is counted only once per page load. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.DocumentPolicy.ReportOnly" |
| enum="DocumentPolicyFeature" expires_after="2021-03-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts report only DocumentPolicyViolationReport generated in a document. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.Extensions.Features" enum="FeatureObserver" |
| expires_after="2021-06-06"> |
| <owner>chasej@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Count of how many page loads use various features for pages with a |
| chrome-extension:// URL only. The PageVisits bucket is incremented for each |
| page load, and the other buckets incremented at most once per PageVisit via |
| the WebCore::UserCounter class. |
| </summary> |
| <details> |
| Warning: This histogram represents pre-renderer metrics and so is flawed |
| under OOPIF. |
| </details> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.FeaturePolicy.Allow" |
| enum="FeaturePolicyFeature" expires_after="2021-10-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts the use of a specific feature policy via the "allow" |
| attribute. Each policy is counted only once per page load. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.FeaturePolicy.AttributeAllowlistType" |
| enum="FeaturePolicyAllowlistType" expires_after="2021-10-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Logs the type of allowlist used in a Feature-Policy "allow" |
| attribute; whether it is empty, or contains only a single keyword, is |
| composed only of keywords, or contains explicit tuple origins. Recorded at |
| the point that the attribute is parsed. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.FeaturePolicy.Header" |
| enum="FeaturePolicyFeature" expires_after="2021-10-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts the use of a specific feature policy via the |
| "Feature-Policy" HTTP response header. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.FeaturePolicy.HeaderAllowlistType" |
| enum="FeaturePolicyAllowlistType" expires_after="2021-10-31"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Logs the type of allowlist used in a Feature-Policy header; whether it is |
| empty, or contains only a single keyword, is composed only of keywords, or |
| contains explicit tuple origins. Recorded at the point that the header is |
| parsed. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.FeaturePolicy.PotentialViolation" |
| enum="FeaturePolicyFeature" expires_after="2021-01-03"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Tracks potential violations of feature policies in a document. This is |
| emitted once all the conditions for violating the feature policy are met in |
| the document; regardless of whether or not the feature has been disabled in |
| the document; in other words, it still records a potential violation even if |
| there won't be a violation report generated. Note that this is recorded once |
| per document. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.FeaturePolicy.ProposalWouldChangeBehaviour" |
| enum="FeaturePolicyFeature" expires_after="2021-03-07"> |
| <owner>iclelland@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Counts when the result of calling IsFeatureEnabled for an Execution Context |
| would be different under the proposal in https://crbug.com/937171. Each |
| feature is counted only once per execution context. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.Features" enum="FeatureObserver" |
| expires_after="never"> |
| <!-- expires-never: used by Chrome Platform Status dashboard --> |
| |
| <!-- https://www.chromestatus.com/metrics/css/animated --> |
| |
| <owner>chasej@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Count of how many page loads use various features across all frames in a |
| page. The PageVisits bucket is incremented for each page load, and the other |
| buckets incremented at most once per PageVisit via blink::UseCounter and |
| UseCounterPageLoadMetricsObserver. |
| </summary> |
| <details> |
| Note that features used inside of SVG images are tracked separately in the |
| Blink.UseCounter.SVGImage.Features histogram. Features used inside of |
| extension pages are tracked separately in the |
| Blink.UseCounter.Extensions.Features histogram. |
| </details> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.File.Features" enum="FeatureObserver" |
| expires_after="2021-01-10"> |
| <owner>yhirano@chromium.org</owner> |
| <owner>mkwst@chromium.org</owner> |
| <summary> |
| Count of how many `file:` URL page loads use various features across all |
| frames in the page. This histogram has the same semantics as |
| "Blink.UseCounter.Features", but applies only to `file:` URLs |
| (which that histogram does not include). |
| </summary> |
| <details> |
| Refer to "Blink.UseCounter.Features" for more details. |
| </details> |
| </histogram> |
| |
| <histogram name="Blink.UseCounter.MainFrame.Features" enum="FeatureObserver" |
| expires_after="never"> |
| <!-- expires-never: Companion to Blink.UseCounter.Features, which is also expires-never. --> |
| |
| <owner>chasej@chromium.org</owner> |
| <owner>feature-control@chromium.org</owner> |
| <summary> |
| Count of how many page loads use various features across in the main frame |
| of a page. The PageVisits bucket is incremented at the beginning of each |
| page load and the other buckets incremented at most once per PageVisit via |
| blink::UseCounter and UseCounterPageLoadMetricsObserver throughout the |
| lifetime of a page load metrics observer. |
| </summary> |
| <details> |
| This histogram counts usage of web features in main frame only. Refer to |
| Blink.UseCounter.Features for more details. |
| </details> |
| </histogram> |
| |
| <histogram name="Blink.VisibleBeforeLoaded.LazyLoadEligibleFrames.BelowTheFold" |
| enum="NQEEffectiveConnectionType" expires_after="2021-02-21"> |
| <owner>sclittle@chromium.org</owner> |
| <summary> |
| Records the effective connection type whenever a lazyload-eligible (i.e. |
| cross-origin and non-hidden) iframe that was initially below the fold |
| becomes visible before it finishes loading. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.VisibleBeforeLoaded.LazyLoadImages.AboveTheFold" |
| enum="NQEEffectiveConnectionType" expires_after="2021-05-23"> |
| <owner>sclittle@chromium.org</owner> |
| <owner>rajendrant@chromium.org</owner> |
| <summary> |
| Records the effective connection type whenever a lazily loaded image that |
| was initially above the fold becomes visible before it finishes loading. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.VisibleBeforeLoaded.LazyLoadImages.BelowTheFold" |
| enum="NQEEffectiveConnectionType" expires_after="2021-07-04"> |
| <owner>sclittle@chromium.org</owner> |
| <owner>rajendrant@chromium.org</owner> |
| <summary> |
| Records the effective connection type whenever a lazily loaded image that |
| was initially below the fold becomes visible before it finishes loading. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.VisibleLoadTime.LazyLoadEligibleFrames.AboveTheFold" |
| units="ms" expires_after="2021-06-27"> |
| <owner>sclittle@chromium.org</owner> |
| <summary> |
| Milliseconds spent waiting for an above the fold iframe to load. Only fires |
| for iframes that would be eligible for lazy loading, i.e. cross-origin and |
| non-hidden. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.VisibleLoadTime.LazyLoadEligibleFrames.BelowTheFold" |
| units="ms" expires_after="2021-02-21"> |
| <owner>sclittle@chromium.org</owner> |
| <summary> |
| Milliseconds spent waiting for a below the fold iframe to load. Only fires |
| for iframes that would be eligible for lazy loading, i.e. cross-origin and |
| non-hidden. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.VisibleLoadTime.LazyLoadImages.AboveTheFold" |
| units="ms" expires_after="2021-06-27"> |
| <owner>rajendrant@chromium.org</owner> |
| <owner>bengr@chromium.org</owner> |
| <summary> |
| Milliseconds spent waiting for an above the fold image element to load. 0ms |
| is recorded if the image is already loaded by the time user scrolls to it. |
| EffectiveConnectionType (2G, 3G, etc) is recorded as suffix to this |
| histogram. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.VisibleLoadTime.LazyLoadImages.BelowTheFold" |
| units="ms" expires_after="2021-06-27"> |
| <owner>rajendrant@chromium.org</owner> |
| <owner>bengr@chromium.org</owner> |
| <summary> |
| Milliseconds spent waiting for a below the fold image element to load. 0ms |
| is recorded if the image is already loaded by the time user scrolls to it. |
| EffectiveConnectionType (2G, 3G, etc) is recorded as suffix to this |
| histogram. |
| </summary> |
| </histogram> |
| |
| <histogram base="true" name="Blink.WaitForCommit.UpdateTime" |
| units="microseconds" expires_after="2021-07-04"> |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePreFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimePostFCPSuffixes" --> |
| |
| <!-- Name completed by histogram_suffixes name="BlinkUpdateTimeAggregatedSuffixes" --> |
| |
| <owner>schenney@chromium.org</owner> |
| <owner>paint-dev@chromium.org</owner> |
| <summary> |
| Time spent waiting for the compositor thread to begin processing a layer |
| update inside ProxyMain::BeginMainFrame. |
| |
| Note: This histogram does not record metrics on machines with low-resolution |
| clocks. |
| </summary> |
| </histogram> |
| |
| <histogram name="Blink.WindowOpen.FromAdState" enum="WindowOpenFromAdState" |
| expires_after="2019-08-30"> |
| <owner>yaoxia@chromium.org</owner> |
| <owner>csharrison@chromium.org</owner> |
| <summary> |
| Indicates whether the page called window.open() with an ad script in the |
| stack and/or from an ad subframe. Recorded whenever window.open() is called |
| when AdTagging is enabled. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.CollectionRate" units="%" expires_after="M84"> |
| <owner>haraken@chromium.org</owner> |
| <summary> |
| The percentage of objects that have been collected by a Blink GC. 0 is |
| passed if there were no objects when a Blink GC started. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.GCReason" enum="GCReason" expires_after="M84"> |
| <owner>haraken@chromium.org</owner> |
| <summary>A type of Blink GC.</summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.LowMemoryPageNavigationGC.Reduction" units="MB" |
| expires_after="M77"> |
| <owner>keishi@chromium.org</owner> |
| <summary> |
| Amount of memory reduced with the GC triggered on page navigation while the |
| device is in a low memory state. Only implemented on low end Android devices |
| at the moment. Memory usage is approximated by summing the memory usage of |
| the following allocators: BlinkGC, PartitionAlloc, and V8 main thread |
| isolate heap. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.MainThreadMarkingThroughput" units="MB/s" |
| expires_after="M92"> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Marking throughput considering all durations of all marking phases on the |
| main thread and marked bytes within one Blink garbage collection cycle. |
| Reported once per garbage collection cycle at the end. Only reported for |
| platforms supporting high resolution clocks and when more than 1MB of live |
| objects have been found. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.ObjectSizeAfterGC" units="KB" expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| The size of allocated objects just after Blink GC is triggered. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.ObjectSizeBeforeGC" units="KB" expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| The size of allocated objects just before Blink GC is triggered. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.ObjectSizeFreedByHeapCompaction" units="KB" |
| expires_after="M81"> |
| <owner>haraken@chromium.org</owner> |
| <summary> |
| The total size of objects freed by BlinkGC's heap compaction. This is |
| recorded once following each compaction. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForAtomicPhase" units="ms" expires_after="M92"> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of overall garbage collection time when the garbage collector is |
| invoked for finishing a garbage collection. This includes finishing up any |
| already running garbage collection operation. Recorded at the end of each |
| garbage collection. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForAtomicPhaseMarking" units="ms" |
| expires_after="M92"> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of finishing marking the transitive closure of objects during the |
| final Blink garbage collection pause. Recorded at the end of each garbage |
| collection. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForCompleteSweep" units="ms" expires_after="M92"> |
| <owner>bikineev@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of the pause that completes sweeping. Reported once per garbage |
| collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForGCCycle" units="ms" expires_after="M92"> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Sum of all durations of individual phases within one Blink garbage |
| collection. Reported once per garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForGlobalWeakProcessing" units="ms" |
| expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of time taken to run global weak processing of Blink GC. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForHeapCompaction" units="ms" expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of wall time taken to run BlinkGC's heap compaction. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForIncrementalMarking" units="ms" |
| expires_after="M92"> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Sum of all durations of incremental marking phases within one Blink garbage |
| collection cycle. Reported once per garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForInvokingPreFinalizers" units="ms" |
| expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of time taken to run ThreadState::invokePreFinalizers(). |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForMarking" units="ms" expires_after="M92"> |
| <owner>omerkatz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Accumulated sum of all durations of individual phases contributing to |
| marking (main thread and background helpers) within one Blink garbage |
| collection. Reported once per garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForMarkingRoots" units="ms" expires_after="M92"> |
| <owner>omerkatz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of marking roots within one Blink garbage collection. Reported once |
| per garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForNestedInV8" units="ms" expires_after="M92"> |
| <owner>mlippautz@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Duration of the time of Blink garbage collection spent nested in a V8 |
| garbage collection. Reported once per garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForSweepingBackground" units="ms" |
| expires_after="M92"> |
| <owner>bikineev@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Sum of all durations of individual phases contributing to sweeping on |
| background helpers within one Blink garbage collection. Reported once per |
| garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForSweepingForeground" units="ms" |
| expires_after="M92"> |
| <owner>bikineev@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Sum of all durations of individual phases contributing to sweeping on the |
| main thread within one Blink garbage collection. Reported once per garbage |
| collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForSweepingSum" units="ms" expires_after="M92"> |
| <owner>bikineev@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| Accumulated sum of all durations of individual phases contributing to |
| sweeping (main thread and background helpers) within one Blink garbage |
| collection. Reported once per garbage collection at the end. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TimeForTotalCollectGarbage" units="ms" |
| expires_after="M84"> |
| <owner>haraken@chromium.org</owner> |
| <owner>hpayer@chromium.org</owner> |
| <summary> |
| Duration of total Blink garbage collection time when the garbage collector |
| is invoked for finishing a garbage collection. This includes finishing up |
| any already running garbage collection operation as well as potentially |
| performing a follow-up collection synchronously. Recorded each time after |
| invoking the Blink garbage collector. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TotalAllocatedSpace" units="KB" expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| The total size of allocated space in OS when a Blink GC is triggered. |
| </summary> |
| </histogram> |
| |
| <histogram name="BlinkGC.TotalObjectSpace" units="KB" expires_after="M92"> |
| <owner>haraken@chromium.org</owner> |
| <owner>oilpan-reviews@chromium.org</owner> |
| <summary> |
| The total size of object space in all threads when a Blink GC is triggered. |
| </summary> |
| </histogram> |
| |
| </histograms> |
| |
| </histogram-configuration> |