Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8997540220068539056

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


===== TESTED REVISIONS =====
Revision         Exit Code  Std Dev  N  Good?
chromium@427907  0          N/A      2  good
chromium@427931  0          N/A      2  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 660411

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=MPArch.RWH.TabSwitchPaintDuration tab_switching.typical_25
Test Metric: MPArch_RWH_TabSwitchPaintDuration/MPArch_RWH_TabSwitchPaintDuration
Relative Change: 0.00%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1772
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8997540220068539056


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5299763614842880

| 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!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8997538153529309232

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


===== SUSPECTED CL(s) =====
Subject : Turn on Analytic AA in Chrome
Author  : Yuqian Li
Commit description:
  
Update cc_unittests png files to reflect our changes.

We also downgraded some ref tests to pixel tests because
there are some (dR <= 1, dG <= 1, dB <= 1) pixel difference on the
circle boundaries. This seems to be reasonable as the test html usually
has more layers than the ref html. In the future, we may set a
configurable threshold for ref tests so we don't have to downgrade ref
tests for this reason.

BUG=

patch from issue 2407393003 at patchset 20001 (http://crrev.com/2407393003#ps20001)
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
R=ajuma@chromium.org, fmalita@chromium.org

Review URL: https://codereview.chromium.org/2458433002 .

Patch from Yuqian Li <liyuqian@google.com>.

Cr-Commit-Position: refs/heads/master@{#427919}
Commit  : a947a329b3030259fbd042458dd6f31b1fe79dcf
Date    : Thu Oct 27 02:24:39 2016


===== TESTED REVISIONS =====
Revision         Exit Code  Std Dev  N  Good?
chromium@427900  0          N/A      2  good
chromium@427910  0          N/A      2  good
chromium@427915  0          N/A      2  good
chromium@427917  0          N/A      2  good
chromium@427918  0          N/A      2  good
chromium@427919  1          N/A      2  bad    <--
chromium@427937  1          N/A      2  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 660411

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests tab_switching.typical_25
Test Metric: MPArch_RWH_TabSwitchPaintDuration/MPArch_RWH_TabSwitchPaintDuration
Relative Change: Zero to non-zero
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1773
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8997538153529309232


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5342928036167680

| 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!