All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=657271

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg7Y3M-AkM


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

android-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8998395421379668032

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


===== SUSPECTED CL(s) =====
Subject : [builtins] implement Array.prototype[@@iterator] in TFJ builtins
Author  : caitp
Commit description:
  
Implements the variations of CreateArrayIterator() in TFJ builtins
(ArrayPrototypeValues, ArrayPrototypeEntries and ArrayPrototypeKeys), and
provides two new Object types with numerous maps which identify certain
behaviours, which will be useful for inlining.

Removes src/js/array-iterator.js entirely

Also adds support for printing Symbol literals inserted by the Parser during
desugaring when FLAG_print_builtin_ast is set to true.

BUG= v8:5388 
R=bmeurer@chromium.org, cbruni@chromium.org
TBR=ulan@chromium.org

Review-Url: https://codereview.chromium.org/2405253006
Cr-Commit-Position: refs/heads/master@{#40373}
Commit  : 86d0dd362f627a7831b042d4fe8baa121c976fc4
Date    : Tue Oct 18 02:43:14 2016


===== TESTED REVISIONS =====
Revision                       Mean    Std Dev  N  Good?
chromium@425919                208737  1888.83  5  good
chromium@425924                209916  108.057  5  good
chromium@425925                210096  107.478  5  good
chromium@425925,v8@86d0dd362f  214706  131.512  5  bad    <--
chromium@425925,v8@cc07613674  212498  1879.01  5  bad
chromium@425925,v8@3145befb3d  213961  1621.84  5  bad
chromium@425926                214718  107.285  5  bad
chromium@425928                213965  1500.79  5  bad
chromium@425937                213898  1597.69  5  bad

Bisect job ran on: android_nexus5X_perf_bisect
Bug ID: 657271

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.top_10_mobile
Test Metric: memory:chrome:renderer_processes:reported_by_chrome:v8:heap:map_space:allocated_objects_size_avg/memory:chrome:renderer_processes:reported_by_chrome:v8:heap:map_space:allocated_objects_size_avg
Relative Change: 2.47%
Score: 95.0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus5X_perf_bisect/builds/773
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8998395421379668032


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  https://chromeperf.appspot.com/bad_bisect?try_job_id=5901028937957376

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