All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758860

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=00ce9f06d93777798c2eb40091001547385a89507e43b66940564d680c69b1fc


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/8970304006041606592

=== 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.runtimestats.browsing_desktop
  Metric       : v8-gc-total_avg/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 27.18% | 0.561278403587 -> 0.713827022359

Revision                           Result                     N
chromium@496123                    0.561278 +- 0.0191242      6      good
chromium@496416                    0.567862 +- 0.0275903      6      good
chromium@496563                    0.567168 +- 0.0182361      6      good
chromium@496636                    0.566528 +- 0.0213068      6      good
chromium@496655                    0.56534 +- 0.0125558       6      good
chromium@496660                    0.561873 +- 0.02848        6      good
chromium@496661                    0.5623 +- 0.0172707        6      good
chromium@496661,v8@af91eb85de      0.715243 +- 0.0667507      6      bad       <--
chromium@496662                    0.702554 +- 0.0816526      6      bad
chromium@496664                    0.703289 +- 0.0754996      6      bad
chromium@496673                    0.723663 +- 0.031288       6      bad
chromium@496709                    0.713827 +- 0.0779725      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.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/8970304006041606592


For feedback, file a bug with component Speed>Bisection