All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=651112

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgpdqE-ggM


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

chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9000260703406615136

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

Hi zakerinasab@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 : Removing run-time flag "--enable-2d-canvas-clip-aa".
Author  : zakerinasab
Commit description:
  Setting the default behavior to anti-aliasing 2D canvas clips.
Adding run-time flag "--disable-2d-canvas-clip-aa".

BUG= 424291 

Review-Url: https://codereview.chromium.org/2359843003
Cr-Commit-Position: refs/heads/master@{#421198}
Commit  : 20ebca037955834a66e956a2dae71daef7884d25
Date    : Tue Sep 27 14:24:43 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev    N  Good?
chromium@421168  21.5764  0.0305033  5  good
chromium@421188  21.6378  0.107486   5  good
chromium@421193  21.7313  0.078086   5  good
chromium@421196  21.6756  0.0473049  5  good
chromium@421197  21.603   0.0285005  5  good
chromium@421198  22.1326  0.0381529  5  bad    <--
chromium@421208  22.1029  0.0528433  5  bad

Bisect job ran on: win_8_perf_bisect
Bug ID: 651112

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.tough_canvas_cases
Test Metric: frame_times/frame_times
Relative Change: 2.44%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/win_8_perf_bisect/builds/2213
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9000260703406615136


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4955150286848000

| 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!

This CL enables the anti-aliasing for canvas 2D clips while before this anti-aliasing was disabled by default. Therefore, the performance regression is expected.

Expected Acceptable regression -> WontFix