| # Copyright 2014 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. |
| |
| from telemetry.web_perf.metrics import single_event |
| |
| EVENT_NAME = 'FrameView::performLayout' |
| METRIC_NAME = 'layout' |
| |
| class LayoutMetric(single_event._SingleEventMetric): |
| """Reports directly durations of FrameView::performLayout events. |
| |
| layout: Durations of FrameView::performLayout events that were caused by and |
| start during user interaction. |
| |
| Layout happens no more than once per frame, so per-frame-ness is implied. |
| """ |
| |
| def __init__(self): |
| super(LayoutMetric, self).__init__(EVENT_NAME, METRIC_NAME, |
| metric_description=('List of durations of layouts that were caused by ' |
| 'and start during interactions')) |
