All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=678575

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgv8u4qQkM


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8991307138235005616

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


===== SUSPECTED CL(s) =====
Subject : Use timer task runner for V8PerIsolate tasks
Author  : altimin
Commit description:
  
Per the effort of getting rid of default task queue in scheduler, post per-isolate
tasks to renderer-wide timer task queue.

BUG= 676805 

Review-Url: https://codereview.chromium.org/2589363003
Cr-Commit-Position: refs/heads/master@{#441114}
Commit  : 124814c8025c564a6f494a3c9d4c887d57b98f1e
Date    : Tue Jan 03 14:09:53 2017


===== TESTED REVISIONS =====
Revision         Mean      Std Dev    N  Good?
chromium@441113  0.435678  0.0432308  6  good
chromium@441114  0.65412   0.081434   6  bad    <--
chromium@441115  0.648194  0.0509183  6  bad
chromium@441117  0.639324  0.0929132  6  bad
chromium@441121  0.659091  0.0218895  6  bad
chromium@441128  0.663628  0.0566721  6  bad
chromium@441143  0.644233  0.0452766  6  bad
chromium@441172  0.65037   0.0602837  6  bad

Bisect job ran on: mac_10_11_perf_bisect
Bug ID: 678575

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.long_running_idle_gmail_background_tbmv2
Test Metric: v8-gc-incremental-step_avg/v8-gc-incremental-step_avg
Relative Change: 49.28%

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_11_perf_bisect/builds/1154
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8991307138235005616


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  https://chromeperf.appspot.com/bad_bisect?try_job_id=5786811302936576

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