All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758857

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e58f186c16f91528def9f192e047aafbc967cf6045eb7380f4034190d632da0d


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

chromium-rel-mac11
chromium-rel-mac12
chromium-rel-mac12-mini-8gb
chromium-rel-win7-dual
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970304100705791488

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

Suspected Commit
  Author : Michael Hablich
  Commit : af91eb85de58d9205f029da39662740ca7c222f2
  Date   : Wed Aug 23 10:18:57 2017
  Subject: Version 6.2.337.1 (cherry-pick)

Bisect Details
  Configuration: mac_10_12_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : v8-gc-total_avg/browse_media/browse_media_imgur
  Change       : 238.93% | 0.840173356789 -> 2.84758708637

Revision                           Result                    N
chromium@496636                    0.840173 +- 0.275346      6      good
chromium@496652                    0.817107 +- 0.127298      6      good
chromium@496660                    0.931439 +- 0.321136      6      good
chromium@496661                    0.839304 +- 0.368505      6      good
chromium@496661,v8@af91eb85de      2.69378 +- 1.38587        6      bad       <--
chromium@496662                    2.90185 +- 0.560357       6      bad
chromium@496664                    2.79714 +- 1.09406        6      bad
chromium@496668                    2.84759 +- 1.44231        6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.media.imgur v8.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970304100705791488


For feedback, file a bug with component Speed>Bisection