blob: 99e99d2a9a4f23007ad99c3f84f7298c48368941 [file] [log] [blame]
<!--
Copyright 2017 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 Chrome UKM metrics
along with a detailed description for each metric.
See the following doc for details on how to add entries to this file:
https://chromium.googlesource.com/chromium/src.git/+/master/services/metrics/ukm_api.md
Events may be marked with the attribute singular="True" to indicate that
the event will only occur once per source, and multiple entries will just
be describing additional metrics about the same event.
-->
<ukm-configuration>
<event name="AbusiveExperienceHeuristic">
<owner>csharrison@chromium.org</owner>
<owner>yaoxia@chromium.org</owner>
<summary>
Obsolete. Various metrics recording experiences which are commonly used for
abusive purposes.
</summary>
<metric name="DidTabUnder">
<summary>
True if the page attempted a tab-under navigation.
</summary>
</metric>
<metric name="DidWindowOpenFromAdScript">
<summary>
True if the page called window.open with an ad script in the stack.
</summary>
</metric>
<metric name="DidWindowOpenFromAdSubframe">
<summary>
True if the page called window.open() from an ad subframe.
</summary>
</metric>
</event>
<event name="AbusiveExperienceHeuristic.JavaScriptDialog">
<owner>yaoxia@chromium.org</owner>
<metric name="DismissalCause">
<summary>
An enum that specifies the dismissal reason for JavaScript popup dialog
that can be triggered by window.alert(), window.confirm() or
window.prompt(). See JavaScriptDialogTabHelper::DismissalCause for the
enum elements.
</summary>
</metric>
</event>
<event name="AbusiveExperienceHeuristic.TabUnder">
<owner>csharrison@chromium.org</owner>
<metric name="DidTabUnder">
<summary>
True if the page attempted a tab-under navigation.
</summary>
</metric>
</event>
<event name="AbusiveExperienceHeuristic.WindowOpen">
<owner>yaoxia@chromium.org</owner>
<summary>
Recorded whenever window.open() is called when AdTagging is enabled.
</summary>
<metric name="FromAdScript">
<summary>
True if the page called window.open() with an ad script in the stack.
</summary>
</metric>
<metric name="FromAdSubframe">
<summary>
True if the page called window.open() from an ad subframe.
</summary>
</metric>
</event>
<event name="Accessibility.ImageDescriptions">
<owner>dmazzoni@chromium.org</owner>
<summary>
Tracks automatic image descriptions provided to blind users.
</summary>
<metric name="Description" enum="Boolean">
<summary>
Whether the image description included a description.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="ImageAlreadyHasLabel" enum="Boolean">
<summary>
Whether the image already had label text before it was augmented with an
additional description.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="OCR" enum="Boolean">
<summary>
Whether the image description included OCR text.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="Accessibility.Renderer">
<owner>dmazzoni@chromium.org</owner>
<summary>
Tracks the amount of time sending accessibility events from web renderers.
</summary>
<metric name="CpuTime.SendPendingAccessibilityEvents">
<summary>
The amount of time spent in
RenderAccessibilityImpl.SendPendingAccessibilityEvents
</summary>
<aggregation>
<history>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="AdFrameLoad">
<owner>johnidel@chromium.org</owner>
<owner>jkarlin@chromium.org</owner>
<summary>
Records metrics associated with a single ad frame for a page load. An ad
frame includes itself and all of its child frames. Only recorded for frames
with non-zero bytes. Recorded when a page is destroyed or when the app is
backgrounded on mobile.
</summary>
<metric name="CpuTime.PeakWindowedPercent">
<summary>
The peak percentage of CPU utilization attributed to the frame in any 30
second window prior to user activation. Frames that exist for less than 30
seconds still use 30 seconds as the denominator for the calculation.
</summary>
</metric>
<metric name="CpuTime.PreActivation">
<summary>
Wall time of tasks attributed to the frame after the frame recieved user
activation. Measured in millseconds.
</summary>
</metric>
<metric name="CpuTime.Total">
<summary>
Total wall time of tasks attributed to the frame. Measured in
milliseconds.
</summary>
</metric>
<metric name="FrameDepth">
<summary>
The depth of this frame's frame tree. There is no set limit on a frame's
maximum depth.
</summary>
</metric>
<metric name="Loading.CacheBytes">
<obsolete>
Deprecated 09/2019. Replaced with Loading.CacheBytes2.
</obsolete>
<summary>
Bytes loaded from the cache for all resources loaded within the frame.
This is rounded down to the nearest exponential bucket (with a bucket
ratio of 1.3).
</summary>
</metric>
<metric name="Loading.CacheBytes2">
<summary>
Bytes loaded from the cache for all resources loaded within the frame.
This includes bytes loaded from both the HTTP cache and memory cache. This
is rounded down to the nearest exponential bucket (with a bucket ratio of
1.3).
</summary>
</metric>
<metric name="Loading.ImageBytes">
<summary>
Network bytes loaded for resources with an image mime type within the
frame. Includes header bytes. This is rounded down to the nearest
exponential bucket (with a bucket ratio of 1.3).
</summary>
</metric>
<metric name="Loading.JavascriptBytes">
<summary>
Network bytes loaded for resources with a javascript mime type within the
frame. Includes header bytes. This is rounded down to the nearest
exponential bucket (with a bucket ratio of 1.3).
</summary>
</metric>
<metric name="Loading.NetworkBytes">
<summary>
Network bytes loaded for all resources within the frame. Includes header
bytes. This is rounded down to the nearest exponential bucket (with a
bucket ratio of 1.3).
</summary>
</metric>
<metric name="Loading.NumResources">
<summary>
Total number of resources loaded by the frame, including incomplete
resources.
</summary>
</metric>
<metric name="Loading.VideoBytes">
<summary>
Network bytes loaded for resources with a video/ mime type within the
frame. Includes header bytes. This is rounded down to the nearest
exponential bucket (with a bucket ratio of 1.3).
</summary>
</metric>
<metric name="Status.CrossOrigin">
<summary>
An enum representing whether the frame was Cross-Origin or Same-Origin to
it's parent frame. See FrameData::OriginStatus.
</summary>
</metric>
<metric name="Status.Media">
<summary>
An enum representing whether media was played in the frame. See
FrameData::MediaStatus.
</summary>
</metric>
<metric name="Status.UserActivation">
<summary>
An enum representing whether the frame received user activation. See
FrameData::UserActivationStatus.
</summary>
</metric>
<metric name="Timing.FirstContentfulPaint">
<summary>
Number of milliseconds before FirstContentfulpaint was reached in the
frame. This is relative to subframe navigation start.
</summary>
</metric>
<metric name="Timing.Interactive">
<summary>
Number of millseconds before Time-To-Interactive was reached in the frame.
This is relative to subframe navigation start.
</summary>
</metric>
<metric name="Timing.PreActivationForegroundDuration">
<obsolete>
Deprecated 07/2020.
</obsolete>
<summary>
Number of millseconds that the current web contents spent in the
foreground prior to the frame receiving user activation.
</summary>
</metric>
<metric name="Visibility.FrameHeight">
<summary>
Last known height of the iframe in pixels. Not reported accurately when
&quot;Visiblity.Hidden&quot; is true. This is rounded down to the nearest
exponential bucket (with a bucket ratio of 1.15).
</summary>
</metric>
<metric name="Visibility.FrameWidth">
<summary>
Last known width of the iframe in pixels. Not reported accurately when
&quot;Visiblity.Hidden&quot; is true. This is rounded down to the nearest
exponential bucket (with a bucket ratio of 1.15).
</summary>
</metric>
<metric name="Visibility.Hidden">
<summary>
A 0 or 1 values representing whether the frame had a display=none styling
set. Records the last known value.
</summary>
</metric>
</event>
<event name="AdPageLoad" singular="True">
<owner>johnidel@chromium.org</owner>
<owner>jkarlin@chromium.org</owner>
<summary>
Recorded when a page has loaded non-zero ad bytes, and the page is being
destroyed/navigated.
</summary>
<metric name="AdBytes">
<summary>
Amount of network bytes used to load ad resource on the page. Includes
resources that did not finish, and top-level ads. Measured in kilobytes.
</summary>
</metric>
<metric name="AdBytesPerSecond">
<obsolete>
Deprecated 01/2020.
</obsolete>
<summary>
Amount of network bytes used to load ad resources on the page, per second
the page was alive after commit. Measured in kilobytes per second.
</summary>
</metric>
<metric name="AdBytesPerSecondAfterInteractive">
<obsolete>
Deprecated 01/2020.
</obsolete>
<summary>
Amount of network bytes used to load ad resources on the page per second
after the page was interactive. Measured in kilobytes.
</summary>
</metric>
<metric name="AdCpuTime">
<summary>
Amount of CPU wall time inside of ad iframes over the duration of a page
load, while the page is in the foreground. Measured in milliseconds.
</summary>
</metric>
<metric name="AdJavascriptBytes">
<summary>
Amount of network bytes used to load ad resources with a supported
javascript mime type on the page. Measured in kilobytes.
</summary>
</metric>
<metric name="AdVideoBytes">
<summary>
Amount of network bytes used to load ad resources with a video mime type
on the page. Measured in kilobytes.
</summary>
</metric>
<metric name="MainframeAdBytes">
<summary>
Amount of network bytes used to load ad resources in the main frame.
Includes resources that did not finish but does not include resources in
subframes. Measured in bytes. This is rounded to the nearest exponential
bucket (with a bucket ratio of 1.3).
</summary>
</metric>
<metric name="MaxAdDensityByArea">
<summary>
The estimated maximum density of ads on a page by area. Calculated as the
area of ads on the page * 100 / page area. This counts each overlapping
area once, it may be inaccurate due to updates and calculations being
throttled.
</summary>
</metric>
<metric name="MaxAdDensityByHeight">
<summary>
The estimated maximum density of ads on a page by height. Calculated as
the combined height of ads on the page * 100 / page height. This counts
each overlapping area once, it may be inaccurate due to updates and
calculations being throttled.
</summary>
</metric>
<metric name="TotalBytes">
<summary>
Amount of network bytes used to load resources on the page. Includes
resources that did not finish. Measured in kilobytes.
</summary>
</metric>
</event>
<event name="AdsIntervention.LastIntervention" singular="True">
<owner>yaoxia@google.com</owner>
<owner>chrome-ads-core@google.com</owner>
<summary>
Recorded after computing the subresource filter activation for a page at
process response time during navigation. This is only recorded when there
has previously been an ads intervention triggered on the page within the
site data's lifetime (currently 7 days). Clearing site data will reset
intervention information.
</summary>
<metric name="InterventionStatus" enum="AdsInterventionStatus">
<summary>
Records the status of the ads intervention, whether the intervention lead
to subresource filter activation, measured during page load.
</summary>
</metric>
<metric name="InterventionType" enum="AdsViolations">
<summary>
Records the last measured intervention recorded for the page, measured
during page load.
</summary>
</metric>
</event>
<event name="AmpPageLoad" singular="True">
<owner>sullivan@chromium.org</owner>
<metric name="MainFrameAmpPageLoad">
<summary>
True if the page loaded in the main frame is an AMP document (has an amp
attribute in the html element). Will not be recorded for non-AMP frames.
Note that most AMP documents are loaded in a subframe from a reader like
Google Search; this metric measures sites that are using AMP as a
site-wide framework and not a reader experience.
</summary>
</metric>
<metric name="SubFrame.InteractiveTiming.FirstInputDelay3">
<obsolete>
Removed July 2019 in favor of FirstInputDelay4.
</obsolete>
<summary>
Measures First Input Delay, the duration between the hardware timestamp
and the start of event processing on the main thread for the first
meaningful input per navigation, in the AMP subframe. See
https://goo.gl/tr1oTZ for a detailed explanation. In milliseconds.
</summary>
</metric>
<metric name="SubFrame.InteractiveTiming.FirstInputDelay4">
<summary>
Measures First Input Delay, the duration between the hardware timestamp
and the start of event processing on the main thread for the first
meaningful input per navigation, in the AMP subframe. See
https://goo.gl/tr1oTZ for a detailed explanation. In milliseconds.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.AverageCumulativeShiftScore.SessionWindow.Gap5000ms">
<summary>
Measures the average cumulative layout shift (bit.ly/cls-explainer) that
has occurred in a session window, in the AMP subframe. The gap between two
consecutive shifts in a window is not bigger than 5000ms. This metric's
integral value is 100x the fractional cumulative layout shift score
described in the explainer.
</summary>
</metric>
<metric name="SubFrame.LayoutInstability.CumulativeShiftScore">
<summary>
Measures the cumulative layout shift (bit.ly/lsm-explainer) that has
occurred during the session, in the AMP subframe. This metric's integral
value is 100x the fractional cumulative layout shift score described in
the explainer.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.CumulativeShiftScore.BeforeInputOrScroll">
<summary>
Measures the cumulative layout shift (bit.ly/lsm-explainer) that has
occurred in the AMP subframe, before any user input or document scroll.
This metric's integral value is 100x the fractional cumulative layout
shift score described in the explainer.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.MaxCumulativeShiftScore.SessionWindow.Gap1000ms">
<summary>
Measures the maximum cumulative layout shift (bit.ly/cls-explainer) that
has occurred in a session window, in the AMP subframe. The gap between two
consecutive shifts in a window is not bigger than 1000ms. This metric's
integral value is 100x the fractional cumulative layout shift score
described in the explainer.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.MaxCumulativeShiftScore.SessionWindow.Gap1000ms.Max5000ms">
<summary>
Measures the maximum cumulative layout shift (bit.ly/cls-explainer) that
has occurred in a session window, in the AMP subframe. The gap between two
consecutive shifts in a window is not bigger than 1000ms and the maximum
window size is 5000ms. This metric's integral value is 100x the fractional
cumulative layout shift score described in the explainer.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.MaxCumulativeShiftScore.SessionWindowByInputs.Gap1000ms.Max5000ms">
<summary>
Measures the maximum cumulative layout shift (bit.ly/cls-explainer) that
has occurred in a session window, in the AMP subframe. The gap between two
consecutive shifts in a window is not bigger than 1000ms and the maximum
window size is 5000ms. We start a new window whenever there's a user
input. This metric's integral value is 100x the fractional cumulative
layout shift score described in the explainer.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.MaxCumulativeShiftScore.SlidingWindow.Duration1000ms">
<summary>
Measures the maximum cumulative layout shift (bit.ly/cls-explainer) that
has occurred in a 1000ms sliding window, in the AMP subframe. This
metric's integral value is 100x the fractional cumulative layout shift
score described in the explainer.
</summary>
</metric>
<metric
name="SubFrame.LayoutInstability.MaxCumulativeShiftScore.SlidingWindow.Duration300ms">
<summary>
Measures the maximum cumulative layout shift (bit.ly/cls-explainer) that
has occurred in a 300ms sliding window, in the AMP subframe. This metric's
integral value is 100x the fractional cumulative layout shift score
described in the explainer.
</summary>
</metric>
<metric name="SubFrame.LayoutStability.JankScore">
<obsolete>
Removed July 2019 in favor of
SubFrame.LayoutInstability.CumulativeShiftScore.
</obsolete>
<summary>
Measures the amount of layout jank (bit.ly/lsm-explainer) that has
occurred during the session, in the AMP subframe. This metric's integral
value is 100x the fractional jank score described in the explainer.
</summary>
</metric>
<metric name="SubFrame.MainFrameToSubFrameNavigationDelta">
<summary>
Measures the time in milliseconds from the navigation in the main frame to
the navigation in the AMP subframe. Will be negative in cases where the
AMP subframe was prerendered. Will be positive in cases where the main
frame was a non-same-document navigation. Should be near-zero when the
main frame navigation is a same-document navigation and the AMP subframe
was not prerendered.
</summary>
</metric>
<metric
name="SubFrame.PaintTiming.NavigationToExperimentalLargestContentfulPaint">
<obsolete>
Replaced by SubFrame.PaintTiming.NavigationToLargestContentfulPaint2 on
Oct 2020.
</obsolete>
<summary>
Measures the time in milliseconds from navigation timing's navigation
start to the time when the page first paints the experimental largest
content (text or image) within viewport, in the AMP subframe. See
http://bit.ly/largest_contentful_paint_explainer for more details. Differs
from the non-experimental version in that removed content is still
considered a valid candidate.
</summary>
</metric>
<metric name="SubFrame.PaintTiming.NavigationToFirstContentfulPaint">
<summary>
Measures the time in milliseconds from navigation timing's navigation
start to the time when the page first paints content, in the AMP subframe.
A contentful paint includes a paint of text, image, SVG, or canvas.
</summary>
</metric>
<metric name="SubFrame.PaintTiming.NavigationToFirstPaint">
<summary>
Measures the time in milliseconds from navigation timing's navigation
start to the time the first paint is performed, in the AMP subframe.
</summary>
</metric>
<metric name="SubFrame.PaintTiming.NavigationToLargestContentfulPaint">
<summary>
Measures the time in milliseconds from navigation timing's navigation
start to the time when the page first paints the largest content (text or
image) within viewport, in the AMP subframe. See
http://bit.ly/largest_contentful_paint_explainer for more details. Note:
Will be replaced by
SubFrame.PaintTiming.NavigationToLargestContentfulPaint2.
</summary>
</metric>
<metric name="SubFrame.PaintTiming.NavigationToLargestContentfulPaint2">
<summary>
Measures the time in milliseconds from navigation timing's navigation
start to the time when the page first paints the experimental largest
content (text or image) within viewport, in the AMP subframe. See
http://bit.ly/largest_contentful_paint_explainer for more details. Differs
from SubFrame.PaintTiming.NavigationToLargestContentfulPaint in that
removed content is still considered a valid candidate.
</summary>
</metric>
<metric name="SubFrame.PaintTiming.NavigationToLargestContentPaint">
<obsolete>
Deprecated 7/2019
</obsolete>
<summary>
Measures the time in milliseconds from navigation timing's navigation
start to the time when the page first paints the largest content (text or
image) within viewport, in the AMP subframe. See
http://bit.ly/largest_contentful_paint_explainer for more details.
</summary>
</metric>
<metric name="SubFrameAmpPageLoad">
<summary>
True if the page loaded in any subframe is an AMP document (has an amp
attribute in the html element). Will not be recorded for non-AMP frames.
Note that most AMP documents are loaded in a subframe from a reader like
Google Search; this metric measures usage of such readers.
</summary>
</metric>
</event>
<event name="Android.MultiWindowChangeActivity">
<owner>gangwu@chromium.org</owner>
<owner>fgorski@chromium.org</owner>
<summary>
Records when the activity enter or exit Android N+ multi-window mode.
</summary>
<metric name="ActivityType" enum="AndroidMultiWindowActivityType">
<summary>
Enter or exit the multi-window mode.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="Android.MultiWindowState">
<owner>gangwu@chromium.org</owner>
<owner>fgorski@chromium.org</owner>
<summary>
Records the multi window state when the activity is shown.
</summary>
<metric name="WindowState" enum="AndroidMultiWindowState">
<summary>
The state of the multi-window mode, single or multi-window.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="Android.ScreenRotation">
<owner>gangwu@chromium.org</owner>
<owner>fgorski@chromium.org</owner>
<summary>
Records when a user rotates the device triggering a screen orientation
change.
</summary>
<metric name="TargetDeviceOrientation" enum="DeviceOrientation2">
<summary>
The orientation of the device rotated to.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="Android.UserRequestedUserAgentChange">
<owner>gangwu@chromium.org</owner>
<owner>fgorski@chromium.org</owner>
<summary>
Records when a user pressed 'Request Desktop Site' in the app menu.
</summary>
<metric name="UserAgentType" enum="UserAgentRequestType">
<summary>
An enum that records the type of user agent.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="AppListAppClickData">
<owner>pdyson@chromium.org</owner>
<summary>
AppListAppClickData events contain click history metrics for an app. These
events are recorded when an app is launched from the launcher on ChromeOS,
but may be for an app different from the app launched. See event
AppListAppLaunch for more detail on the keys used.
</summary>
<metric name="AppLaunchId">
<summary>
The ID of the app launch event.
</summary>
</metric>
<metric name="AppType">
<summary>
The type of app. 1: CHROME, 2: PLAY, 3: PWA/Bookmark app.
</summary>
</metric>
<metric name="ClickRank">
<summary>
Rank apps by total number of clicks. The app with the most clicks has rank
1.
</summary>
</metric>
<metric name="ClicksEachHour00">
<summary>
The number of clicks on this app in the current session that occurred
between 12:00am and 1:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour01">
<summary>
The number of clicks on this app in the current session that occurred
between 1:00am and 2:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour02">
<summary>
The number of clicks on this app in the current session that occurred
between 2:00am and 3:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour03">
<summary>
The number of clicks on this app in the current session that occurred
between 3:00am and 4:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour04">
<summary>
The number of clicks on this app in the current session that occurred
between 4:00am and 5:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour05">
<summary>
The number of clicks on this app in the current session that occurred
between 5:00am and 6:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour06">
<summary>
The number of clicks on this app in the current session that occurred
between 6:00am and 7:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour07">
<summary>
The number of clicks on this app in the current session that occurred
between 7:00am and 8:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour08">
<summary>
The number of clicks on this app in the current session that occurred
between 8:00am and 9:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour09">
<summary>
The number of clicks on this app in the current session that occurred
between 9:00am and 10:00am. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour10">
<summary>
The number of clicks on this app in the current session that occurred
between 10:00am and 11:00am. Bucketing: values above 20 rounded down to
the nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour11">
<summary>
The number of clicks on this app in the current session that occurred
between 11:00am and 12:00pm. Bucketing: values above 20 rounded down to
the nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour12">
<summary>
The number of clicks on this app in the current session that occurred
between 12:00pm and 1:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour13">
<summary>
The number of clicks on this app in the current session that occurred
between 1:00pm and 2:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour14">
<summary>
The number of clicks on this app in the current session that occurred
between 2:00pm and 3:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour15">
<summary>
The number of clicks on this app in the current session that occurred
between 3:00pm and 4:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour16">
<summary>
The number of clicks on this app in the current session that occurred
between 4:00pm and 5:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour17">
<summary>
The number of clicks on this app in the current session that occurred
between 5:00pm and 6:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour18">
<summary>
The number of clicks on this app in the current session that occurred
between 6:00pm and 7:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour19">
<summary>
The number of clicks on this app in the current session that occurred
between 7:00pm and 8:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour20">
<summary>
The number of clicks on this app in the current session that occurred
between 8:00pm and 9:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour21">
<summary>
The number of clicks on this app in the current session that occurred
between 9:00pm and 10:00pm. Bucketing: values above 20 rounded down to the
nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour22">
<summary>
The number of clicks on this app in the current session that occurred
between 10:00pm and 11:00pm. Bucketing: values above 20 rounded down to
the nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksEachHour23">
<summary>
The number of clicks on this app in the current session that occurred
between 11:00pm and 12:00am. Bucketing: values above 20 rounded down to
the nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="ClicksLast24Hours">
<summary>
The number of clicks on this app in the last 24 hours. Accurate to 15
minutes. Bucketing: values above 20 rounded down to the nearest 10.
Maximum value of 200.
</summary>
</metric>
<metric name="ClicksLastHour">
<summary>
The number of clicks on this app in the last hour. Accurate to one minute.
Bucketing: values above 20 rounded down to the nearest 10. Maximum value
of 200.
</summary>
</metric>
<metric name="LastLaunchedFrom">
<summary>
Where the app was last launched from. 1: GRID, 2: SUGGESTED, 3: SHELF.
</summary>
</metric>
<metric name="MostRecentlyUsedIndex">
<summary>
Index recording when in the sequence of app launch clicks the app was last
clicked on. 0: most recent app clicked on, 1: app clicked immediately
before the most recent, etc.
</summary>
</metric>
<metric name="SequenceNumber">
<summary>
The sequence number of the AppListAppLaunch event that corresponds to this
AppListAppClickData event. There will be six AppListAppClickData events
for each sequence number.
</summary>
</metric>
<metric name="TimeSinceLastClick">
<summary>
Time since this app was last clicked on to launch. In seconds, bucketed:
[1, 59] to the nearest second, [60, 599] to the nearest minute, [600,
1199] to the nearest 5 minutes, [1200, 3599] to the nearest 10 minutes,
[3600, 17999] to the nearest 30 minutes, [18000, 86400] to the nearest
hour.
</summary>
</metric>
<metric name="TotalClicks">
<summary>
Total number of clicks launching this app in this sesion. Bucketing:
values above 20 rounded down to the nearest 10. Maximum value of 200.
</summary>
</metric>
</event>
<event name="AppListAppLaunch">
<owner>pdyson@chromium.org</owner>
<summary>
Recorded when an app is launched from the launcher on ChromeOS. This can be
from the suggestion chip, or from the grid of apps. The UKM metrics are not
keyed by navigational urls. Instead, for Chrome apps the keys are based upon
the app id, for Play apps the keys are based upon a hash of the package name
and for PWAs and bookmark apps the keys are the urls associated with the
PWA/bookmark.
</summary>
<metric name="AllClicksLast24Hours">
<summary>
Total number of clicks launching logged apps in the last 24 hours.
Accurate to the nearest 15 minutes. Bucketing: values above 20 rounded
down to the nearest 10. Maximum value of 200.
</summary>
</metric>
<metric name="AllClicksLastHour">
<summary>
Total number of clicks launching logged apps in the last hour. Accurate to
the nearest minute. Bucketing: values above 20 rounded down to the nearest
10. Maximum value of 200.
</summary>
</metric>
<metric name="AppType">
<summary>
The type of app. 1: CHROME, 2: PLAY, 3: PWA/Bookmark app.
</summary>
</metric>
<metric name="ClickMethod">
<summary>
Click method. 1: MOUSE, 2: TOUCH, 3: SYTLUS, 4: KEYBOARD.
</summary>
</metric>
<metric name="DayOfWeek">
<summary>
An enum representing the day of the week that the data was logged in the
local time zone. Sunday = 0.
</summary>
</metric>
<metric name="DeviceMode">
<summary>
The mode of the device. 1: CLOSED_LID (Lid is closed), 2: LAPTOP (Lid is
open, tablet mode off or unsupported) , 3: TABLET (Lid is open, tablet
mode on or no lid at all).
</summary>
</metric>
<metric name="DeviceType">
<summary>
The type of the device. 1: TABLET, 2: LAPTOP.
</summary>
</metric>
<metric name="HourOfDay">
<summary>
The hour of the day when the data is logged. Hours since midnight in the
local time zone.
</summary>
</metric>
<metric name="LaunchedFrom">
<summary>
Where the app was launched from. 1: GRID, 2: SUGGESTED, 3: SHELF.
</summary>
</metric>
<metric name="PositionIndex">
<summary>
The position of the app within the grid/suggested apps/shelf. 0 is the
first position.
</summary>
</metric>
<metric name="TotalHours">
<summary>
Number of hours in the current session up to this event. Bucketing:
exponential buckets, increasing in size by 25%, rounded to the nearest
integer. i.e. 0, 1, 2, 3, 4, 5, 6, 7, 9, 12, 15, 18, 23, 28, 36, 44...
</summary>
</metric>
</event>
<event name="AppListNonAppImpression">
<obsolete>
Deprecated March 2021.
</obsolete>
<owner>jiameng@chromium.org</owner>
<owner>thanhdng@chromium.org</owner>
<owner>tby@chromium.org</owner>
<summary>
Records details of impressions and launches of non-apps in the ChromeOS
launcher, such as files, omnibox results, and answer cards.
</summary>
<metric name="Category" enum="AppListNonAppImpressionCategory">
<summary>
The kind of launcher item. Corresponds to the value of
ChromeSearchResult::result_[sub]type.
</summary>
</metric>
<metric name="DayOfWeek">
<summary>
The day of the week that the event was logged on, in the local time zone.
Sunday is 0.
</summary>
</metric>
<metric name="DeviceMode" enum="AppListNonAppImpressionDeviceMode">
<summary>
The mode of the device.
</summary>
</metric>
<metric name="EventId">
<summary>
An ID linking together events within a single set of launcher search
results. One of these may be a launch, and the rest impressions.
</summary>
</metric>
<metric name="FileExtension" enum="AppListNonAppImpressionFileExtension">
<summary>
An enum representing the file extension if this event represents a local
or DriveFS file.
</summary>
</metric>
<metric name="HourOfDay">
<summary>
The hour of the day that the event was logged in. Hours measured from
midnight in the local timezone.
</summary>
</metric>
<metric name="IsLaunched" enum="Boolean">
<summary>
True if the item represented by this event was launched, false otherwise.
</summary>
</metric>
<metric name="LaunchesAtHour00">
<summary>
The number of launches within the last 24 hours at hour 0. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour01">
<summary>
The number of launches within the last 24 hours at hour 1. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour02">
<summary>
The number of launches within the last 24 hours at hour 2. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour03">
<summary>
The number of launches within the last 24 hours at hour 3. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour04">
<summary>
The number of launches within the last 24 hours at hour 4. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour05">
<summary>
The number of launches within the last 24 hours at hour 5. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour06">
<summary>
The number of launches within the last 24 hours at hour 6. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour07">
<summary>
The number of launches within the last 24 hours at hour 7. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour08">
<summary>
The number of launches within the last 24 hours at hour 8. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour09">
<summary>
The number of launches within the last 24 hours at hour 9. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour10">
<summary>
The number of launches within the last 24 hours at hour 10. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour11">
<summary>
The number of launches within the last 24 hours at hour 11. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour12">
<summary>
The number of launches within the last 24 hours at hour 12. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour13">
<summary>
The number of launches within the last 24 hours at hour 13. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour14">
<summary>
The number of launches within the last 24 hours at hour 14. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour15">
<summary>
The number of launches within the last 24 hours at hour 15. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour16">
<summary>
The number of launches within the last 24 hours at hour 16. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour17">
<summary>
The number of launches within the last 24 hours at hour 17. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour18">
<summary>
The number of launches within the last 24 hours at hour 18. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour19">
<summary>
The number of launches within the last 24 hours at hour 19. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour20">
<summary>
The number of launches within the last 24 hours at hour 20. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour21">
<summary>
The number of launches within the last 24 hours at hour 21. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour22">
<summary>
The number of launches within the last 24 hours at hour 22. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesAtHour23">
<summary>
The number of launches within the last 24 hours at hour 23. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="LaunchesThisSession">
<summary>
How many times this item has been launched during this session. Rounded
down to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="Position">
<summary>
The index of this item in the search results list. Indices start at 0.
</summary>
</metric>
<metric name="QueryLength">
<summary>
The length of the raw search query with whitespace trimmed. Rounded down
to the nearest exponential bucket, with a bucket ratio of 1.15.
</summary>
</metric>
<metric name="RelevanceScore">
<summary>
The raw relevance score returned by the relevant search provider for this
item.
</summary>
</metric>
<metric name="TimeOfLastLaunch">
<summary>
The hour when the previous launch of this item occurred. Hours measured
from midnight in the local timezone. This can be any value 0-23, as the
last launch could have been on a previous day.
</summary>
</metric>
<metric name="TimeSinceLastLaunch">
<summary>
Seconds since this item was last launched in this session. Rounded down to
the nearest exponential bucket, with a bucket ratio of 1.045. This makes
the bucket at 24 hour mark approximately 1 hour long.
</summary>
</metric>
</event>
<event name="Autofill.CardUploadDecision">
<owner>sebsg@chromium.org</owner>
<metric name="UploadDecision">
<summary>
Whether the upload was proposed to the user or the reasons why it was not.
The value is a bitmask of |CardUploadDecisionMetric|.
</summary>
</metric>
</event>
<event name="Autofill.DeveloperEngagement">
<owner>jiahuiguo@google.com</owner>
<summary>
Recorded when we parse a form to log whether developer has used autocomplete
markup or UPI-VPA hints. The value is a bitmask of
|DeveloperEngagementMetric|.
</summary>
<metric name="DeveloperEngagement"/>
<metric name="FormSignature">
<summary>
The signature of the form. This is the hash identifier used to denote this
form for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="FormTypes">
<summary>
Type of form. Stored as bitvector. A set ith bit implies enum FormType's
ith type was detected. Multiple types are possible.
</summary>
</metric>
<metric name="IsForCreditCard">
<summary>
True for credit card forms, false for address/profile forms. See
|FormStructure::IsCompleteCreditCardForm()|.
</summary>
</metric>
</event>
<event name="Autofill.EditedAutofilledFieldAtSubmission">
<owner>koerber@google.com</owner>
<owner>battre@google.com</owner>
<summary>
Records when a user edits a value that was filled by autofill.
</summary>
<metric name="FieldSignature">
<summary>
The signature of the field. This is the hash identifier used to denote
this field for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form. This is the hash identifier used to denote this
form for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="OverallType" enum="AutofillServerFieldType">
<summary>
Field's overall |ServerFieldType|. See: autofill::ServerFieldType
</summary>
</metric>
</event>
<event name="Autofill.FieldFillStatus">
<owner>rogerm@chromium.org</owner>
<summary>
Recorded when Chrome validates field type predictions (on submit, on leaving
a form, on receiving a form with autocomplete attributes).
</summary>
<metric name="FieldSignature">
<summary>
The signature of the field. This is the hash identifier used to denote
this field for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form. This is the hash identifier used to denote this
form for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="IsAutofilled">
<summary>
The field is currently autofilled.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
<metric name="PredictionSource">
<summary>
The system which generated the prediction: heuristics, server, overall.
</summary>
</metric>
<metric name="ValidationEvent">
<summary>
The event which triggered the validation: Submission, Left Form, Form has
Autocomplete attributes.
</summary>
</metric>
<metric name="WasPreviouslyAutofilled">
<summary>
The field was autofilled and subsequently edited.
</summary>
</metric>
</event>
<event name="Autofill.FieldTypeValidation">
<owner>rogerm@chromium.org</owner>
<summary>
Recorded when Chrome validates field type predictions (on submit, on leaving
a form, on receiving a form with autocomplete attributes).
</summary>
<metric name="ActualType" enum="AutofillServerFieldType">
<summary>
The observed type of the field. See: autofill::ServerFieldType
</summary>
</metric>
<metric name="FieldSignature">
<summary>
The signature of the field
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
<metric name="PredictedType" enum="AutofillServerFieldType">
<summary>
The predicted type of the field. See: autofill::ServerFieldType
</summary>
</metric>
<metric name="PredictionSource" enum="AutofillPredictionSource">
<summary>
The system which generated the prediction: heuristics, server, overall.
</summary>
</metric>
<metric name="ValidationEvent" enum="AutofillQualitiyMetricType">
<summary>
The event which triggered the validation: Submission, Left Form, Form has
Autocomplete attributes.
</summary>
</metric>
</event>
<event name="Autofill.FormEvent">
<owner>dlkumar@google.com</owner>
<summary>
Recorded when user interacted with autofill.
</summary>
<metric name="AutofillFormEvent">
<summary>
Logs autofill form events funnel. See |FormEvent|.
</summary>
</metric>
<metric name="FormTypes">
<summary>
Type of form. Stored as bitvector. A set ith bit implies enum FormType's
ith type was detected. Multiple types are possible.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
</event>
<event name="Autofill.FormFillSuccessIOS">
<owner>kazinova@chromium.org</owner>
<summary>
Records whether the the form was successfully filled by Autofill on iOS. The
metric is used to measure silent renderer fails when the filling request is
executed successfully but the results reported in a callback are empty.
</summary>
<metric name="FormFillSuccess" enum="Boolean">
<summary>
A boolean indicating success or failure.
</summary>
</metric>
</event>
<event name="Autofill.FormSubmitted">
<owner>jiahuiguo@google.com</owner>
<summary>
Recorded when user submits a form.
</summary>
<metric name="AutofillFormSubmittedState">
<summary>
Whether form's fields were all autofilled, some fields were autofilled, or
none of the field were autofilled. See |AutofillFormSubmittedState|.
</summary>
</metric>
<metric name="FormSignature">
<summary>
FormSignature is approximately 10 bit hash of form structure.
</summary>
</metric>
<metric name="FormTypes">
<summary>
Type of form. Stored as bitvector. A set ith bit implies enum FormType's
ith type was detected. Multiple types are possible.
</summary>
</metric>
<metric name="HasUpiVpaField">
<summary>
True for forms containing a UPI/VPA field.
</summary>
</metric>
<metric name="IsForCreditCard">
<summary>
True for credit card forms, false for address/profile forms. See
|FormStructure::IsCompleteCreditCardForm()|.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
</event>
<event name="Autofill.HiddenRepresentationalFieldSkipDecision">
<owner>parastoog@chromium.org</owner>
<summary>
Recorded while trying to fill or preview a hidden or a representational
field.
</summary>
<metric name="FieldOverallType">
<summary>
Field's overall |ServerFieldType|. See |AutofillField.GetStorableType()|.
</summary>
</metric>
<metric name="FieldSignature">
<summary>
The signature of the field. This is the hash identifier used to denote
this field for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="FieldTypeGroup">
<summary>
Field's |FieldTypeGroup|. See |AutofillType.group()|.
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form. This is the hash identifier used to denote this
form for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="HeuristicType">
<summary>
Field's |ServerFieldType| based on heuristics. See
|AutofillField.heuristic_type()|.
</summary>
</metric>
<metric name="HtmlFieldMode">
<summary>
Whether the field's autocomplete hint specified 'billing' or 'shipping'.
See |AutofillField.html_mode()|.
</summary>
</metric>
<metric name="HtmlFieldType">
<summary>
Field's autocomplete field type hint. See |AutofillField.html_type()|.
</summary>
</metric>
<metric name="IsSkipped">
<summary>
True if the field was skipped while filling or previewing the form,
because it was hidden or representational, but not a 'select' one.
</summary>
</metric>
<metric name="ServerType">
<summary>
Field's |ServerFieldType| returned by server. See
|AutofillField.server_type()|.
</summary>
</metric>
</event>
<event name="Autofill.InteractedWithForm">
<owner>jiahuiguo@google.com</owner>
<summary>
Recorded when we parse a form to log form metadata and autofill settings
that apply to all subsequent events for this form.
</summary>
<metric name="FormSignature">
<summary>
FormSignature is approximately 10 bit hash of form structure.
</summary>
</metric>
<metric name="FormTypes">
<summary>
Type of form. Stored as bitvector. A set ith bit implies enum FormType's
ith type was detected. Multiple types are possible.
</summary>
</metric>
<metric name="IsForCreditCard">
<summary>
True for credit card forms, false for address/profile forms.
</summary>
</metric>
<metric name="LocalRecordTypeCount">
<summary>
Number of local credit cards or local autofill profiles.
</summary>
</metric>
<metric name="ServerRecordTypeCount">
<summary>
Number of masked and full server credit cards or server autofill profiles.
</summary>
</metric>
</event>
<event name="Autofill.RepeatedServerTypePredictionRationalized">
<owner>parastoog@chromium.org</owner>
<summary>
Recorded when a field type predicted by server is rationalized because of
repetition.
</summary>
<metric name="FieldNewOverallType">
<summary>
Field's overall |ServerFieldType| after rationalization. See
|AutofillField.GetStorableType()|.
</summary>
</metric>
<metric name="FieldOldOverallType">
<summary>
Field's overall |ServerFieldType| before rationalization. See
|AutofillField.GetStorableType()|.
</summary>
</metric>
<metric name="FieldSignature">
<summary>
The signature of the field. This is the hash identifier used to denote
this field for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="FieldTypeGroup">
<summary>
Field's |FieldTypeGroup|. See |AutofillType.group()|.
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form. This is the hash identifier used to denote this
form for query and voting purposes. See
components/autofill/core/common/signatures_util.cc for more details.
</summary>
</metric>
<metric name="HeuristicType">
<summary>
Field's |ServerFieldType| based on heuristics. See
|AutofillField.heuristic_type()|.
</summary>
</metric>
<metric name="HtmlFieldMode">
<summary>
Whether the field's autocomplete hint specified 'billing' or 'shipping'.
See |AutofillField.html_mode()|.
</summary>
</metric>
<metric name="HtmlFieldType">
<summary>
Field's autocomplete field type hint. See |AutofillField.html_type()|.
</summary>
</metric>
<metric name="ServerType">
<summary>
Field's |ServerFieldType| returned by server. See
|AutofillField.server_type()|.
</summary>
</metric>
</event>
<event name="Autofill.SelectedMaskedServerCard">
<obsolete>
Deprecated 2/2019
</obsolete>
<owner>jiahuiguo@google.com</owner>
<metric name="MillisecondsSinceFormParsed">
<summary>
Obsolete.
Time since form parse.
</summary>
</metric>
</event>
<event name="Autofill.SuggestionFilled">
<owner>jiahuiguo@google.com</owner>
<summary>
Recorded when user selects a suggestion and we fill the form with that
suggestion.
</summary>
<metric name="FieldSignature">
<summary>
The signature of the field
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form.
</summary>
</metric>
<metric name="IsForCreditCard">
<summary>
True for credit card forms, false for address/profile forms.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
<metric name="RecordType">
<summary>
Whether the suggestion was from a local card/autofill profile or from a
server card/autofill profile.
</summary>
</metric>
</event>
<event name="Autofill.SuggestionsShown">
<owner>jiahuiguo@google.com</owner>
<summary>
Recorded when a suggestion is shown to user.
</summary>
<metric name="FieldSignature">
<summary>
The signature of the field
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form.
</summary>
</metric>
<metric name="HeuristicType">
<summary>
Field's |ServerFieldType| based on heuristics. See
|AutofillField.heuristic_type()|.
</summary>
</metric>
<metric name="HtmlFieldType">
<summary>
Field's autocomplete field type hint. See |AutofillField.html_type()|.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
<metric name="ServerType">
<summary>
Field's |ServerFieldType| returned by server. See
|AutofillField.server_type()|.
</summary>
</metric>
</event>
<event name="Autofill.TextFieldDidChange">
<owner>jiahuiguo@google.com</owner>
<summary>
Recorded when user edits a text field. The text field may have been
autofilled.
</summary>
<metric name="FieldSignature">
<summary>
The signature of the field
</summary>
</metric>
<metric name="FieldTypeGroup">
<summary>
Field's |FieldTypeGroup|. See |AutofillType.group()|.
</summary>
</metric>
<metric name="FormSignature">
<summary>
The signature of the form.
</summary>
</metric>
<metric name="HeuristicType">
<summary>
Field's |ServerFieldType| based on heuristics. See
|AutofillField.heuristic_type()|.
</summary>
</metric>
<metric name="HtmlFieldMode">
<summary>
Whether the field's autocomplete hint specified 'billing' or 'shipping'.
See |AutofillField.html_mode()|.
</summary>
</metric>
<metric name="HtmlFieldType">
<summary>
Field's autocomplete field type hint. See |AutofillField.html_type()|.
</summary>
</metric>
<metric name="IsAutofilled">
<summary>
True if the field was autofilled. See |AutofillField.is_autofilled|.
</summary>
</metric>
<metric name="IsEmpty">
<summary>
True if the field was empty. See |AutofillField.IsEmpty()|.
</summary>
</metric>
<metric name="MillisecondsSinceFormParsed">
<summary>
Time since form parse.
</summary>
</metric>
<metric name="ServerType">
<summary>
Field's |ServerFieldType| returned by server. See
|AutofillField.server_type()|.
</summary>
</metric>
</event>
<event name="AutofillAssistant.LiteScriptFinished">
<owner>arbesser@google.com</owner>
<owner>mcarlen@google.com</owner>
<owner>marianfe@google.com</owner>
<summary>
Recorded when a lite script has finished, either because the user made a
choice, or because some error occurred.
</summary>
<metric name="LiteScriptFinished" enum="AutofillAssistantLiteScriptFinished">
<summary>
An enum that describes the different ways a lite script can finish. Users
may click continue, cancel, or indirectly abort the experience in various
ways. See components/autofill_assistant/browser/metrics.h.
</summary>
<aggregation>
<history>
<index fields="metrics.TriggerUIType"/>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="TriggerUIType" enum="AutofillAssistantTriggerUIType">
<summary>
A enum that captures the type of trigger and its intent.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="AutofillAssistant.LiteScriptOnboarding">
<owner>arbesser@google.com</owner>
<owner>mcarlen@google.com</owner>
<owner>marianfe@google.com</owner>
<summary>
Recorded after a user has finished a lite script flow and accepted the final
prompt in it.
</summary>
<metric name="LiteScriptOnboarding"
enum="AutofillAssistantLiteScriptOnboarding">
<summary>
An enum that describes whether users who have successfully finished a lite
script also accepted the onboarding or not. See
components/autofill_assistant/browser/metrics.h.
</summary>
<aggregation>
<history>
<index fields="metrics.TriggerUIType"/>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="TriggerUIType" enum="AutofillAssistantTriggerUIType">
<summary>
A enum that captures the type of trigger and its intent.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="AutofillAssistant.LiteScriptShownToUser">
<owner>arbesser@google.com</owner>
<owner>mcarlen@google.com</owner>
<owner>marianfe@google.com</owner>
<summary>
Recorded when a lite script starts and when the UI is shown to the user.
</summary>
<metric name="LiteScriptShownToUser"
enum="AutofillAssistantLiteScriptShownToUser">
<summary>
An enum that captures the number of times a lite script was displayed,
versus the number of times that the lite script was run in total. See
components/autofill_assistant/browser/metrics.h.
</summary>
<aggregation>
<history>
<index fields="metrics.TriggerUIType"/>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="TriggerUIType" enum="AutofillAssistantTriggerUIType">
<summary>
A enum that captures the type of trigger and its intent.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="AutofillAssistant.LiteScriptStarted">
<owner>arbesser@google.com</owner>
<owner>mcarlen@google.com</owner>
<owner>marianfe@google.com</owner>
<summary>
Recorded at the time when the decision is made to start (or not to start) a
lite script.
</summary>
<metric name="LiteScriptStarted" enum="AutofillAssistantLiteScriptStarted">
<summary>
An enum that captures the different ways a lite script may be started or
suppressed. See components/autofill_assistant/browser/metrics.h.
</summary>
<aggregation>
<history>
<index fields="metrics.TriggerUIType"/>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="TriggerUIType" enum="AutofillAssistantTriggerUIType">
<summary>
A enum that captures the type of trigger and its intent.
</summary>
<aggregation>
<history>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="BackForwardCacheDisabledForRenderFrameHostReason">
<owner>altimin@chromium.org</owner>
<owner>hajimehoshi@chromium.org</owner>
<summary>
Recorded at a history commit for each reason passed to
BackForwardCache::DisableForRenderFrameHost. The source IDs match with the
source IDs of HistoryNavigation events.
</summary>
<metric name="Reason"
enum="BackForwardCacheDisabledForRenderFrameHostReasonShort">
<obsolete>
Deprecated as of 03/2021. Replaced with Reason2.
</obsolete>
<summary>
For history navigations, records the reason passed to
BackForwardCache::DisableForRenderFrameHost calls.
The metric is recorded when a history navigation commits and emits a
sample for each reason. One history navigation can emit multiple reasons,
and these reasons are recorded as multiple events with the same source ID
based on the navigation ID.
</summary>
</metric>
<metric name="Reason2"
enum="BackForwardCacheDisabledForRenderFrameHostReason2">
<summary>
For history navigations, records the reason passed to
BackForwardCache::DisableForRenderFrameHost calls. The reason is specified
as a 48-bit int representing the source (blink or an embedder) and a
source-specific 16-bit int representing the reason specific to that
source.
The metric is recorded when a history navigation commits and emits a
sample for each reason. One history navigation can emit multiple reasons,
and these reasons are recorded as multiple events with the same source ID
based on the navigation ID.
</summary>
</metric>
</event>
<event name="BackgroundFetch">
<owner>nator@chromium.org</owner>
<owner>rayankans@chromium.org</owner>
<owner>peter@chromium.org</owner>
<summary>
A BackgroundFetch event is logged before a background fetch is started from
a document context.
</summary>
<metric name="DeniedDueToPermissions">
<summary>
Boolean for whether the background fetch was denied due to permission.
This includes only the content setting permission.
</summary>
</metric>
<metric name="DownloadTotal">
<summary>
The value of downloadTotal provided with the background fetch. This is the
number of bytes that the developer expects to be downloaded with the
background fetch. This number is exponentially bucketed for privacy
reasons, and uses the UKM GetExponentialBucketMin method with a value of
2.0 for spacing.
</summary>
</metric>
<metric name="HasTitle">
<summary>
Boolean for whether a title was provided with the background fetch.
</summary>
</metric>
<metric name="NumIcons">
<summary>
Count of icons provided with the background fetch.
</summary>
</metric>
<metric name="NumRequestsInFetch">
<summary>
Number of requests in the background fetch. This number is exponentially
bucketed for privacy reasons, and uses the UKM GetExponentialBucketMin
method with a value of 2.0 for spacing.
</summary>
</metric>
<metric name="RatioOfIdealToChosenIconSize">
<summary>
Ratio of the ideal icon to the chosen icon size, times hundred. This will
be set to -1 if either ideal icon size is 0, or if none of the provided
icons are suitable.
</summary>
</metric>
</event>
<event name="BackgroundFetchDeletingRegistration">
<owner>nator@chromium.org</owner>
<owner>rayankans@chromium.org</owner>
<owner>peter@chromium.org</owner>
<summary>
A BackgroundFetchDeletingRegistration event is logged when a background
fetch job is being deleted.
</summary>
<metric name="UserInitiatedAbort">
<summary>
Boolean for whether the background fetch job was cancelled from the UI.
</summary>
</metric>
</event>
<event name="BackgroundSyncCompleted">
<owner>nator@chromium.org</owner>
<owner>rayankans@chromium.org</owner>
<owner>peter@chromium.org</owner>
<summary>
Logged when a Background Sync one-shot registration is completed.
</summary>
<metric name="MaxAttempts">
<summary>
Integer value of the maximum number of allowed retries.
</summary>
</metric>
<metric name="NumAttempts">
<summary>
Integer value of the number of retries / sync events dispatched.
</summary>
</metric>
<metric name="Status">
<summary>
The enum value of the completion status, defined in
blink::ServiceWorkerStatusCode.
</summary>
</metric>
</event>
<event name="BackgroundSyncRegistered">
<owner>nator@chromium.org</owner>
<owner>rayankans@chromium.org</owner>
<owner>peter@chromium.org</owner>
<summary>
Logged when a one-shot Background Sync registration is created.
</summary>
<metric name="CanFire">
<summary>
Boolean for whether a sync event can be immediately dispatched for this
registration.
</summary>
</metric>
<metric name="IsReregistered">
<summary>
Boolean for whether this is a duplicate registration.
</summary>
</metric>
</event>
<event name="Badging">
<owner>phillis@chromium.org</owner>
<owner>cmumford@chromium.org</owner>
<summary>
Metrics that measure the use of Badging API
</summary>
<metric name="UpdateAppBadge" enum="UpdateAppBadgeTypes">
<summary>
Logged when navigator.setAppBadge or navigator.clearAppBadge is called.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<enumeration/>
</statistics>
</history>
</aggregation>
</metric>
</event>
<event name="Blink.ContextMenu.ImageSelection">
<owner>benwgold@google.com</owner>
<owner>flackr@chromium.org</owner>
<summary>
Sent when a user long presses or right clicks a document (and that an image
is found). Requires that the `EnablePenetratingImageSelection` feature is
enabled together with a `logUkm` specific finch param.
</summary>
<metric name="Outcome" enum="ImageSelectionOutcome">
<summary>
Emits an integer id for a selection corresponding to the
ImageSelectionOutcome enum defined in Blink's context_menu_controller.h.
</summary>
</metric>
</event>
<event name="Blink.FindInPage" singular="True">
<owner>vmpstr@chromium.org</owner>
<owner>chrishtr@chromium.org</owner>
<owner>paint-dev@chromium.org</owner>
<summary>
Logged once per page; indicates the type of find-in-page behaviors users
utilizied.
</summary>
<metric name="BeforematchExpandedHiddenMatchable">
<summary>
Boolean indicating that a find-in-page match was hidden but became visible
after the beforematch event was fired.
</summary>
</metric>
<metric name="DidHaveRenderSubtreeMatch">
<summary>
Boolean indicating whether there was an active match in content-visibility
unrendered elements.
</summary>
</metric>
<metric name="DidSearch">
<summary>
Boolean indicating that find-in-page happened.
</summary>
</metric>
</event>
<event name="Blink.HTMLParsing">
<owner>schenney@chromium.org</owner>
<owner>dom-dev@chromium.org</owner>
<summary>
Logged once per page load, to capture information about invocation of the
HTMLDocumentParser for the initial document load. Does not include other
aspects of document parsing, such as style sheet parsing or script execution
during parsing. Also does not include innerText parsing.
This event is not recorded on machines with low-resolution clocks.
</summary>
<metric name="ChunkCount">
<summary>
The number of chunks parsed while loading the page. Each chunk represents
a piece of the HTML content that can be loaded without blocking or
yielding.
</summary>
</metric>
<metric name="ParsingTimeMax">
<summary>
The maximum time used to parse a single chunk before being blocked,
yielding or completing, in microseconds.
</summary>
</metric>
<metric name="ParsingTimeMin">
<summary>
The minimum time used to parse a single chunk before being blocked,
yielding or completing, in microseconds.
</summary>
</metric>
<metric name="ParsingTimeTotal">
<summary>
The total amount of time spent in the HTMLDocumentParser parsing the page,
in microseconds.
</summary>
</metric>
<metric name="TokensParsedAverage">
<summary>
The average number of tokens parsed across all chunks.
</summary>
</metric>
<metric name="TokensParsedMax">
<summary>
The maximum number of tokens parsed as a chunk.
</summary>
</metric>
<metric name="TokensParsedMin">
<summary>
The minimum number of tokens parsed as a chunk.
</summary>
</metric>
<metric name="YieldedTimeAverage">
<summary>
The average time between parsing of two chunks, in microseconds. Will be
zero if only one chunk was parsed.
</summary>
</metric>
<metric name="YieldedTimeMax">
<summary>
The minimum time between parsing of two chunks, in microseconds. Will be
zero if only one chunk was parsed.
</summary>
</metric>
<metric name="YieldedTimeMin">
<summary>
The maximum time between parsing of two chunks, in microseconds. Will be
zero if only one chunk was parsed.
</summary>
</metric>
</event>
<event name="Blink.PageLoad">
<owner>schenney@chromium.org</owner>
<owner>paint-dev@chromium.org</owner>
<summary>
The aggregated time spent in each metric's component from creation of the
local frame view to the First Contentful Paint signal. The event is reported
once per page load when First Contentful Paint is signaled.
This event is not recorded on machines with low-resolution clocks.
</summary>
<metric name="Animate">
<summary>
The time spent in main frame animation, between navigation and First
Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="Compositing">
<obsolete>
Obsolete as of http://crrev.com/794384 and M86.
</obsolete>
<summary>
The time spent in main thread compositing, between navigation and First
Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="CompositingAssignments">
<summary>
The time spent in main thread compositing assignments, between navigation
and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="CompositingCommit">
<summary>
The time spent committing main thread compositing results, between
navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="CompositingInputs">
<summary>
The time spent in main thread compositing inputs, between navigation and
First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="ContentDocumentUpdate">
<summary>
The time spent doing forced document updates due to update sub-document
content, between navigation and First Contentful Paint, in microseconds.
Includes SVG, Canvas and Plugins.
</summary>
</metric>
<metric name="DisplayLockIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for
DisplayLockDocumentState, in microseconds.
</summary>
</metric>
<metric name="ForcedStyleAndLayout">
<summary>
The time spent in forced style recalc and layouts, between navigation and
First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="HandleInputEvents">
<summary>
The time spent in processing rAF-aligned input for the main frame, between
navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="HitTestDocumentUpdate">
<summary>
The time spent updating the document in preparation for a hit test for the
main frame, between navigation and First Contentful Paint, in
microseconds.
</summary>
</metric>
<metric name="ImplCompositorCommit">
<summary>
The time spent committing layer tree impl data in the compositor thread,
between navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="IntersectionObservation">
<summary>
The time spent computing intersection observer state, between navigation
and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="JavascriptDocumentUpdate">
<summary>
The time spent doing forced document updates due to generic Javascript API
requests, between navigation and First Contentful Paint, in microseconds.
Note this primarily captures Javascript that explicitly requires Style and
Layout, but not implicit requests such as through setting focus or scroll
position.
</summary>
</metric>
<metric name="JavascriptIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for javascript observers, in
microseconds.
</summary>
</metric>
<metric name="Layout">
<summary>
The time spent in layout document lifecycle work, between navigation and
First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="LazyLoadIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for lazy loading, in
microseconds.
</summary>
</metric>
<metric name="MainFrame">
<summary>
The time spent in ProxyMain::BeginMainFrame, between navigation and First
Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="MediaIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for media elements, in
microseconds.
</summary>
</metric>
<metric name="Paint">
<summary>
The time spent in paint document lifecycle work, between navigation and
First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="PrePaint">
<summary>
The time spent in pre-paint document lifecycle work, between navigation
and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="ProxyCommit">
<obsolete>
Removed in M84 in favor of separate ImplCompositorCommit and WaitForCommit
metrics.
</obsolete>
<summary>
The time spent committing main thread to impl layer tree information,
between navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="ScrollDocumentUpdate">
<summary>
The time spent doing forced document updates due to update scroll-related
data, between navigation and First Contentful Paint, in microseconds.
Includes actions like scroll-to-fragment.
</summary>
</metric>
<metric name="ScrollingCoordinator">
<obsolete>
Merged into CompositingCommit in http://crrev.com/815947 in M88.
</obsolete>
<summary>
The time spent in ScrollingCoordinator, between navigation and First
Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="ServiceDocumentUpdate">
<summary>
The time spent doing forced document updates due to browser requested
actions, such as accessibility, intersection observer or spell checking,
between navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="Style">
<summary>
The time spent in style document lifecycle work, between navigation and
First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="StyleAndLayout">
<obsolete>
Removed January 2020 in favor of separate Style and Layout metrics.
</obsolete>
<summary>
The time spent in layout and style document lifecycle work, between
navigation and First Contentful Paint, in microseconds. Will be obsolete
in M-82.
</summary>
</metric>
<metric name="UpdateLayers">
<summary>
The time spent in for LayerTreeHost::UpdateLayers, between navigation and
First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="UpdateViewportIntersection">
<summary>
Time spent computing internal geometry information about iframes, between
navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
<metric name="UserDrivenDocumentUpdate">
<summary>
The time spent doing forced document updates due to a user action such as
input, find-in-page or printing, between navigation and First Contentful
Paint, in microseconds.
</summary>
</metric>
<metric name="WaitForCommit">
<summary>
The time spent waiting for the compositor thread to begin processing a
commit, between navigation and First Contentful Paint, in microseconds.
</summary>
</metric>
</event>
<event name="Blink.PaintTiming" singular="True">
<owner>npm@chromium.org</owner>
<owner>sullivan@chromium.org</owner>
<summary>
Paint timing metrics recorded in Blink, usually used as debugging metrics
for PaintTiming metrics in the PageLoad event.
</summary>
<metric name="LCPDebugging.HasViewportImage" enum="Boolean">
<summary>
Records whether a page has an image whose size equals the full viewport.
Recorded when the LCP algorithm has stopped.
</summary>
</metric>
</event>
<event name="Blink.Script.AsyncScripts" singular="True">
<owner>dom@chromium.org</owner>
<owner>chrome-loading@google.com</owner>
<summary>
Metrics associated with the async script count associated with a document,
recorded when the HTML parsing of a mainframe has completed.
</summary>
<metric name="AsyncScriptCount">
<summary>
The total number of async scripts associated with a document at the time
parsing has finished.
</summary>
</metric>
</event>
<event name="Blink.UpdateTime">
<owner>schenney@chromium.org</owner>
<owner>paint-dev@chromium.org</owner>
<summary>
Metrics that measure various update times in Blink. This includes paint,
compositing, and layout update times. This event is reported once in the
first main frame update after First Contentful Paint, with data from a
randomly chosen frame up to and including First Contentful Paint, and once
on LocalFrameView destruction with data from a random frame between
FirstContentfulPaint and shutdown.
This event is not recorded on machines with low-resolution clocks.
</summary>
<metric name="Animate">
<summary>
The time taken for main frame animation in microseconds during the sampled
frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="Animate.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time taken for main frame animation in microseconds in the
event period.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="Animate.AverageRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average over frames within the sample window of the ratio of time
taken for main frame animation to the total time for the main frame. An
int in the range [0,100].
</summary>
</metric>
<metric name="Animate.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time taken for main frame animation in microseconds in
the event period.
</summary>
</metric>
<metric name="Animate.WorstCaseRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The highest proportion of a frame ever used for main frame animation
within the sample window. An int in the range [0,100].
</summary>
</metric>
<metric name="AnimateBeginMainFrame">
<summary>
The total main frame time used by by main thread animations, in
microseconds.
</summary>
</metric>
<metric name="AnimatePercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with AnimateBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used by main thread animations. An
int in the range [0,100].
</summary>
</metric>
<metric name="Compositing">
<obsolete>
Obsolete as of http://crrev.com/794384.
</obsolete>
<summary>
The time taken by the compositing phase in microseconds during the sampled
frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="Compositing.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time taken by the compositing phase in microseconds in the
event period.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="Compositing.AverageRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average over frames within the sample window of the ratio of time
taken in the compositing phase to the total time for the main frame. An
int in the range [0,100].
</summary>
</metric>
<metric name="Compositing.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time taken by the compositing phase in microseconds in
the event period.
</summary>
</metric>
<metric name="Compositing.WorstCaseRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The highest proportion of a frame ever used by the compositing phase
within the sample window. An int in the range [0,100].
</summary>
</metric>
<metric name="CompositingAssignments">
<summary>
The time taken by compositing assignments in microseconds during the
sampled frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="CompositingAssignmentsBeginMainFrame">
<summary>
The total main frame time used by the compositing assignments phase, in
microseconds.
</summary>
</metric>
<metric name="CompositingAssignmentsPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with
CompositingAssignmentsBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used by the compositing assignments
phase. An int in the range [0,100].
</summary>
</metric>
<metric name="CompositingCommit">
<summary>
The time taken by the compositing commit in microseconds during the
sampled frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="CompositingCommit.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time taken by the compositing commit at the end of the blink
lifecycle, in microseconds in the event period.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="CompositingCommit.AverageRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average over frames within the sample window of the ratio of time
taken by the compositing commit at the end of the blink lifecycle to the
total time for the main frame. An int in the range [0,100].
</summary>
</metric>
<metric name="CompositingCommit.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time taken by the compositing commit at the end of the
blink lifecycle, in microseconds in the event period.
</summary>
</metric>
<metric name="CompositingCommit.WorstCaseRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The highest proportion of a frame ever taken by the compositing commit at
the end of the blink lifecycle to the total time for the main frame. An
int in the range [0,100].
</summary>
</metric>
<metric name="CompositingCommitBeginMainFrame">
<summary>
The total main frame time used by the compositing commit, in microseconds.
</summary>
</metric>
<metric name="CompositingCommitPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with CompositingCommitBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used by the compositing commit. An
int in the range [0,100].
</summary>
</metric>
<metric name="CompositingInputs">
<summary>
The time taken by the compositing inputs phase in microseconds during the
sampled frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="CompositingInputsBeginMainFrame">
<summary>
The total main frame time used by the compositing inputs phase, in
microseconds.
</summary>
</metric>
<metric name="CompositingInputsPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with CompositingInputsBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used by the compositing inputs
phase. An int in the range [0,100].
</summary>
</metric>
<metric name="CompositingPercentage">
<obsolete>
Obsolete as of http://crrev.com/794384.
</obsolete>
<summary>
The percentage of the main frame time used by the compositing phase. An
int in the range [0,100].
</summary>
</metric>
<metric name="ContentDocumentUpdate">
<summary>
The time spent doing forced document updates due to update sub-document
content, during a sampled frame, in microseconds. Includes SVG, Canvas and
Plugins.
</summary>
</metric>
<metric name="ContentDocumentUpdateBeginMainFrame">
<summary>
The time spent doing forced document updates due to update sub-document
content, during the BeginMainFrame block of a sampled frame, in
microseconds. Includes SVG, Canvas and Plugins.
</summary>
</metric>
<metric name="DisplayLockIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for
DisplayLockDocumentState, in microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="DisplayLockIntersectionObserverBeginMainFrame">
<summary>
The total main frame time used to compute IntersectionObservations for
DisplayLockDocumentState, in microseconds.
</summary>
</metric>
<metric name="ForcedStyleAndLayout">
<summary>
The time taken by forced style recalc and layouts in microseconds between
the end of the last main frame update and the current sampled frame, in
microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="ForcedStyleAndLayout.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time taken by all forced style recalcs and layouts in
microseconds in the event period.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="ForcedStyleAndLayout.AverageRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average over frames within the sample window of the ratio of time
taken by forced style recalc and layouts at the end of the blink lifecycle
to the total time for the main frame. An int in the range [0,100].
</summary>
</metric>
<metric name="ForcedStyleAndLayout.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time taken by a forced style recalc and layout in
microseconds in the event period.
</summary>
</metric>
<metric name="ForcedStyleAndLayout.WorstCaseRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The highest proportion of a frame ever taken by forced style recalc and
layouts at the end of the blink lifecycle to the total time for the main
frame. An int in the range [0,100].
</summary>
</metric>
<metric name="ForcedStyleAndLayoutBeginMainFrame">
<summary>
The total main frame time used by forced style updates and layouts, in
microseconds. This metric may include time that is also included in the
AnimateBeginMainFrame metric.
</summary>
</metric>
<metric name="ForcedStyleAndLayoutPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with
ForcedStyleAndLayoutBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used by forced style updates and
layouts during the main frame update (not including time outside of the
frame update. This metric may include time that is also included in the
AnimatePercentage metric. An int in the range [0,100].
</summary>
</metric>
<metric name="HandleInputEvents">
<summary>
The time taken to process rAF-aligned input for the main frame in
microseconds during the sampled frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="HandleInputEvents.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time taken to process rAF-aligned input for the main frame in
microseconds in the event period.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="HandleInputEvents.AverageRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average over frames within the sample window of the ratio of time
taken to process rAF-aligned input for the main frame to the total time
for the main frame. An int in the range [0,100].
</summary>
</metric>
<metric name="HandleInputEvents.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time taken to process rAF-aligned input for the main
frame in microseconds in the event period.
</summary>
</metric>
<metric name="HandleInputEvents.WorstCaseRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The highest proportion of a frame ever taken to process rAF-aligned input
for the main frame to the total time for the main frame. An int in the
range [0,100].
</summary>
</metric>
<metric name="HandleInputEventsBeginMainFrame">
<summary>
The total main frame time used in processing rAF-aligned input, in
microseconds.
</summary>
</metric>
<metric name="HandleInputEventsPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with HandleInputEventsBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used in processing rAF-aligned
input. An int in the range [0,100].
</summary>
</metric>
<metric name="HitTestDocumentUpdate">
<summary>
The time taken to perform hit test document updates for the main frame in
microseconds during the sampled frame. It does not compute the actual hit
test time, rather the style, layout, compositing, etc time to prepare for
the test.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="HitTestDocumentUpdateBeginMainFrame">
<summary>
The total main frame time used in performing hit test document updates, in
microseconds.
</summary>
</metric>
<metric name="HitTestDocumentUpdatePercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with
HitTestDocumentUpdateBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used in performing hit test document
updates. An int in the range [0,100].
</summary>
</metric>
<metric name="ImplCompositorCommit">
<summary>
The time spent committing layer tree impl data in the compositor thread,
in microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="ImplCompositorCommitBeginMainFrame">
<summary>
The total main frame time spent committing layer tree impl data in the
compositor thread, in microseconds. This should always match
ImplCompositorCommit and serves as a check.
</summary>
</metric>
<metric name="ImplCompositorCommitPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with
ImplCompositorCommitBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time spent committing layer tree impl
data in the compositor thread. An int in the range [0,100].
</summary>
</metric>
<metric name="IntersectionObservation">
<summary>
The time taken to compute intersection observer state for the main frame
in microseconds during the sampled frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="IntersectionObservation.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time taken to compute IntersectionObserver observations in
microseconds in the event period.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="IntersectionObservation.AverageRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average over frames within the sample window of the ratio of time
taken compute IntersectionObserver observations to the total time for the
main frame. An int in the range [0,100].
</summary>
</metric>
<metric name="IntersectionObservation.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time taken to compute IntersectionObserver observations
in microseconds in the event period.
</summary>
</metric>
<metric name="IntersectionObservation.WorstCaseRatio">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The highest proportion of a frame ever taken to compute
IntersectionObserver observations within the sample window. An int in the
range [0,100].
</summary>
</metric>
<metric name="IntersectionObservationBeginMainFrame">
<summary>
The total main frame time used to compute IntersectionObserver
observations, in microseconds.
</summary>
</metric>
<metric name="IntersectionObservationPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with
IntersectionObservationBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used in computing intersection
observer state. An int in the range [0,100].
</summary>
</metric>
<metric name="JavascriptDocumentUpdate">
<summary>
The time spent doing forced document updates due to generic Javascript API
requests, during a sampled frame, in microseconds. Note this primarily
captures Javascript that explicitly requires Style and Layout, but not
implicit requests such as through setting focus or scroll position.
</summary>
</metric>
<metric name="JavascriptDocumentUpdateBeginMainFrame">
<summary>
The time spent doing forced document updates due to generic Javascript API
requests, during the BeginMainFrame block of a sampled frame, in
microseconds. Note this primarily captures Javascript that explicitly
requires Style and Layout, but not implicit requests such as through
setting focus or scroll position.
</summary>
</metric>
<metric name="JavascriptIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for javascript observers, in
microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="JavascriptIntersectionObserverBeginMainFrame">
<summary>
The total main frame time used to compute IntersectionObservations for
Javascript observers, in microseconds.
</summary>
</metric>
<metric name="Layout">
<summary>
The time taken for layout for the main frame in microseconds during the
sampled frame.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="LayoutBeginMainFrame">
<summary>
The total main frame time used in layout, in microseconds.
</summary>
</metric>
<metric name="LayoutPercentage">
<obsolete>
Deprecated as of 11/2020. Replaced with LayoutBeginMainFrame.
</obsolete>
<summary>
The percentage of the main frame time used in layout work. An int in the
range [0,100].
</summary>
</metric>
<metric name="LazyLoadIntersectionObserver">
<summary>
Time spent computing IntersectionObservations for lazy loading, in
microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="LazyLoadIntersectionObserverBeginMainFrame">
<summary>
The total main frame time used to compute IntersectionObservations for
lazy loading, in microseconds.
</summary>
</metric>
<metric name="MainFrame">
<summary>
The time between a BeginMainFrame and the commit of paint results for the
sampled frame, in microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="MainFrame.Average">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The average time between a BeginMainFrame and the commit of paint results,
in microseconds.
</summary>
<aggregation>
<history>
<index fields="profile.country"/>
<statistics>
<quantiles type="std-percentiles"/>
</statistics>
</history>
</aggregation>
</metric>
<metric name="MainFrame.WorstCase">
<obsolete>
Deprecated as of 03/2019.
</obsolete>
<summary>
The longest single time between a BeginMainFrame and the commit of paint
results, in microseconds.
</summary>
</metric>
<metric name="MainFrameIsBeforeFCP" enum="Boolean">
<summary>
True if the lifecycle update in this event occurred before FCP (First
Contentful Paint) was registered.
</summary>
</metric>
<metric name="MainFrameReasons">
<summary>
A bitfield representation of the reasons for a main frame update. The
fields are based on the FrameSequenceTrackerType enum, so bitwise and with
the following values to determine if a reason was present:
CompositorAnimation: 1, MainThreadAnimation: 2, PinchZoom: 4, RAF: 8,
TouchScroll: 16, Universal: 32, Video: 64 and WheelScroll: 128.
</summary>
</metric>
<metric name="MediaIntersectionObserver">