All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775433

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9a6c8ee4672101c4d66d03c7758f9fe312a1e115de5708139dedd300c5705bba


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965499353512691392

=== Auto-CCing suspected CL author hans@chromium.org ===

Hi hans@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Hans Wennborg
  Commit : 8316001e3f423f6ca2e7a9a7258c22944d16ae13
  Date   : Fri Oct 13 20:32:51 2017
  Subject: Roll Clang 313786:315613

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : v8-gc-incremental-step_max/browse_social/browse_social_pinterest_infinite_scroll
  Change       : 40.40% | 18.088 -> 25.3948333333

Revision             Result                  N
chromium@508719      18.088 +- 2.98685       6      good
chromium@508786      17.711 +- 1.91581       6      good
chromium@508803      16.8992 +- 3.48512      6      good
chromium@508804      25.824 +- 3.92332       6      bad       <--
chromium@508805      26.4607 +- 3.28172      6      bad
chromium@508807      25.4988 +- 4.81504      6      bad
chromium@508811      23.964 +- 5.64017       6      bad
chromium@508819      24.3408 +- 5.40229      6      bad
chromium@508852      25.3948 +- 7.91856      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.social.pinterest.infinite.scroll v8.runtimestats.browsing_mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965499353512691392


For feedback, file a bug with component Speed>Bisection

 Issue 775288  has been merged into this issue.

 Issue 776751  has been merged into this issue.

 Issue 776947  has been merged into this issue.