All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=659536

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg3YOTsgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgvYqvqQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg3ZWi_QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg3aWS6wkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgvc6EpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgvfLHuwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgvfjUswkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg3b2MkggM


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

chromium-rel-mac10
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8997749435259631968

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


===== SUSPECTED CL(s) =====
Subject : Initialize buffers before allowing access to them.
Author  : zmo
Commit description:
  
Also, refactor buffer access validation a bit to reduce
duplicated codes.

(Note that this is still part 1 of the work. We have more
buffer access paths that we need to put in buffer access
validation.)

BUG= 654201 
TEST=gpu_unittests, webgl_conformance
R=piman@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2435803004
Cr-Commit-Position: refs/heads/master@{#427200}
Commit  : 26c35c2e81f97a5b291ebd4d639fc3f1a4cc50e8
Date    : Tue Oct 25 01:03:34 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N  Good?
chromium@427191  60.8699  0.323219  5  good
chromium@427199  61.0619  1.14936   5  good
chromium@427200  84.99    0.603691  5  bad    <--
chromium@427201  85.0215  0.230274  5  bad
chromium@427203  84.9473  0.80416   5  bad
chromium@427206  85.0018  0.286986  5  bad

Bisect job ran on: winx64ati_perf_bisect
Bug ID: 659536

Test Command: src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests smoothness.tough_webgl_cases
Test Metric: frame_times/http___kenrussell.github.io_webgl-animometer_Animometer_tests_3d_webgl.html
Relative Change: 39.64%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/winx64ati_perf_bisect/builds/1627
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8997749435259631968


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  https://chromeperf.appspot.com/bad_bisect?try_job_id=5852540804005888

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