All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=595710

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgwL215QkM


Bot(s) for this bug's original alert(s):

chromium-rel-mac-retina

=== Auto-CCing suspected CL author erikchen@chromium.org ===

Hi erikchen@chromium.org, the bisect results pointed to your CL below as possibly
causing a regression. Please have a look at this info and see whether
your CL be related.


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


===== SUSPECTED CL(s) =====
Subject : Re-enable IOSurface Canvas2D.
Author  : erikchen
Commit description:
  
Previously, WebExternalTextureLayerImpl inferred the size of the texture from
the bounds of the WebLayer, but the two are not necessarily the same. This CL
passes the texture size through WebExternalTextureMailbox.

This CL also adds a pixel test.

BUG= 595063 
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1804243002

Cr-Commit-Position: refs/heads/master@{#381570}
Commit  : 4e7ecf36fb2af3e3677c085de5b1ea6e7e75f3be
Date    : Wed Mar 16 22:35:24 2016


===== TESTED REVISIONS =====
Revision                Mean Value  Std. Dev.   Num Values  Good?
chromium@381525         8.476255    0.048204    5           good
chromium@381557         8.496954    0.034773    8           good
chromium@381565         8.492412    0.057821    8           good
chromium@381569         8.478386    0.033587    8           good
chromium@381570         8.718893    0.054692    5           bad
chromium@381571         8.705404    0.056029    5           bad
chromium@381573         8.728021    0.022585    5           bad
chromium@381589         8.720134    0.034509    8           bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 595710

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --also-run-disabled-tests thread_times.tough_scrolling_cases
Test Metric: thread_total_all_cpu_time_per_frame/thread_total_all_cpu_time_per_frame
Relative Change: 3.01%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1213
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9017934711543263200


| 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 label Cr-Tests-AutoBisect.  Thank you!

This has recovered.