All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=671050

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgp-D_swoM


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8994161243007342784

Bisect failed: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus6_perf_bisect/builds/2798
Failure reason: the build has failed due to infrastructure failure.

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8994155943228842816

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


===== SUSPECTED CL(s) =====
Subject : [regexp] Migrate @@match to TurboFan
Author  : jgruber
Commit description:
  
Microbenchmarks show a 4x improvement on the fast path and 2.5x improvement on
the slow path when compared to the CPP builtin implementation.

Compared to the old JS implementation, the fast path is 20% faster and the slow
path 35% slower.

BUG= v8:5339 , v8:5562 

Review-Url: https://codereview.chromium.org/2527963002
Cr-Commit-Position: refs/heads/master@{#41338}
Commit  : 4e7571a5a9bb8563ae93e0aff48c08bead765b14
Date    : Tue Nov 29 09:03:18 2016


===== TESTED REVISIONS =====
Revision                       Mean     Std Dev  N   Good?
chromium@434955                82739.2  1679350  50  good
chromium@434971                82739.2  1679350  50  good
chromium@434975                82739.2  1679350  50  good
chromium@434977                82739.2  1679350  50  good
chromium@434978                82739.2  1502056  40  good
chromium@434978,v8@18eda7024b  82739.2  1679350  50  good
chromium@434978,v8@9c0e2a6723  82739.2  1679350  50  good
chromium@434978,v8@4e7571a5a9  154829   1668928  50  bad    <--
chromium@434979                154829   1668928  50  bad
chromium@434986                154829   1668928  50  bad
chromium@435016                154829   1668928  50  bad
chromium@435076                154829   1668928  50  bad

Bisect job ran on: android_nexus6_perf_bisect
Bug ID: 671050

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.blink_memory_mobile
Test Metric: memory:chrome:renderer_processes:reported_by_chrome:v8:heap:large_object_space:effective_size_avg/memory:chrome:renderer_processes:reported_by_chrome:v8:heap:large_object_space:effective_size_avg
Relative Change: 87.13%

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus6_perf_bisect/builds/2799
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8994155943228842816


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  https://chromeperf.appspot.com/bad_bisect?try_job_id=5792403565314048

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