All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758858

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=bb86c86ef38b842d1d8d23f603567e8c0a82db5afa46f3094c4fa64a5bec0e31


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

chromium-rel-mac11-pro
chromium-rel-win7-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970304045060140096

=== 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_pro_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : v8-gc-total_avg/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 28.65% | 0.561404622213 -> 0.722238415024

Revision                           Result                     N
chromium@496123                    0.561405 +- 0.0248897      6      good
chromium@496416                    0.559067 +- 0.0338091      6      good
chromium@496563                    0.556944 +- 0.0263129      6      good
chromium@496636                    0.559021 +- 0.0236776      6      good
chromium@496655                    0.5629 +- 0.022949         6      good
chromium@496660                    0.563431 +- 0.0356149      6      good
chromium@496661                    0.565423 +- 0.0362484      6      good
chromium@496661,v8@af91eb85de      0.70386 +- 0.0387202       6      bad       <--
chromium@496662                    0.717882 +- 0.0698139      6      bad
chromium@496664                    0.707918 +- 0.0815754      6      bad
chromium@496673                    0.724742 +- 0.117208       6      bad
chromium@496709                    0.722238 +- 0.0466712      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.tech.discourse.infinite.scroll v8.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970304045060140096


For feedback, file a bug with component Speed>Bisection