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Issue metadata

Status: Duplicate
Merged: issue 616871
Owner:
Closed: Jul 2016
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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8.1%-30.9% regression in startup.warm.blank_page at 402515:402560

Project Member Reported by qyears...@chromium.org, Jul 2 2016

Issue description

See the link to graphs below.
 
Mergedinto: 616871
Status: Duplicate (was: Assigned)

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : Clean up the RWHVMac to ui::Compositor interface
Author  : ccameron
Commit description:
  
Move the "ui::Compositor's relationship to RWHVMac" state machine
into BrowserCompositorViewMac.

Clarify the state by renaming states from
  Active / Suspended / Destroyed
to
  HasAttachedCompositor / HasDetachedCompositor / HasNoCompositor

Change the thumbnailer's copy requests to be intercepted by the
BrowserCompositorViewMac, and thereby have the copy request
keep the ui::Compositor attached (even if the RenderWidgetHostImpl
is hidden).

BUG= 623716 

Review-Url: https://codereview.chromium.org/2093113003
Cr-Commit-Position: refs/heads/master@{#402541}
Commit  : 9e8481c2e211439771d0634043d2addf9fe7b4ec
Date    : Tue Jun 28 21:07:43 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N  Good?
chromium@402529  200.621  1.85163  5  good
chromium@402537  202.442  1.24749  5  good
chromium@402539  201.421  1.05788  5  good
chromium@402540  200.916  1.67291  5  good
chromium@402541  253.989  4.07026  5  bad    <--
chromium@402544  253.274  1.76704  5  bad

Bisect job ran on: mac_10_11_perf_bisect
Bug ID: 625412

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests startup.warm.blank_page
Test Metric: open_tabs_time/open_tabs_time
Relative Change: 26.24%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_11_perf_bisect/builds/705
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9008224776214714464


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5771223292706816

| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Tests>AutoBisect.  Thank you!

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