All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=763763

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=59557b7ace8817ea62c98d663d0608bbd197e627287b4c0d580927bf3510040c


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

chromium-rel-mac-retina
chromium-rel-mac11-pro
chromium-rel-win7-gpu-ati
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968777243016538128

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968777127449587632

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : 2eb3c8ac7ffc6840dc07f5e8312576e107eece23
  Date   : Wed Sep 06 02:01:21 2017
  Subject: cc: Flush after every tile task set completes.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : V8 C++:duration_avg/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 346.59% | 775.315 -> 3462.50383333

Revision             Result                  N
chromium@499771      775.315 +- 26.2405      6      good
chromium@499824      766.585 +- 70.4294      6      good
chromium@499837      778.719 +- 33.7314      6      good
chromium@499844      761.095 +- 58.02        6      good
chromium@499845      3447.04 +- 215.136      6      bad       <--
chromium@499846      3386.5 +- 201.291       6      bad
chromium@499847      3413.55 +- 79.3683      6      bad
chromium@499850      3434.01 +- 187.752      6      bad
chromium@499876      3462.5 +- 150.853       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/8968777243016538128


For feedback, file a bug with component Speed>Bisection

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : 2eb3c8ac7ffc6840dc07f5e8312576e107eece23
  Date   : Wed Sep 06 02:01:21 2017
  Subject: cc: Flush after every tile task set completes.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : V8 C++:duration_avg/browse_social/browse_social_twitter_infinite_scroll
  Change       : 28.26% | 1399.83833333 -> 1795.37666667

Revision             Result                  N
chromium@499771      1399.84 +- 131.704      6      good
chromium@499824      1295.53 +- 251.716      6      good
chromium@499837      1274.68 +- 267.976      6      good
chromium@499844      1332.11 +- 230.841      6      good
chromium@499845      1704.6 +- 179.547       6      bad       <--
chromium@499846      1776.99 +- 125.389      6      bad
chromium@499847      1748.86 +- 190.809      6      bad
chromium@499850      1703.83 +- 195.239      6      bad
chromium@499876      1795.38 +- 114.662      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.social.twitter.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/8968777127449587632


For feedback, file a bug with component Speed>Bisection