All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783636

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=759f0100aad0fd24b3db78ec4aaf1e0aa4b5eb8824ca028db0c5109ba24b6116


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

win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963323395769281360

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : 6bb1d47e6e82f75ead36cdab209afc5dafa8329c
  Date   : Tue Nov 07 13:11:10 2017
  Subject: [heap] Re-enable concurrent marking.

Bisect Details
  Configuration: winx64_high_dpi_perf_bisect
  Benchmark    : memory.long_running_idle_gmail_tbmv2
  Metric       : v8-gc-total_avg/v8-gc-total_avg
  Change       : 47.71% | 0.52913472803 -> 0.781607238483

Revision                           Result                     N
chromium@514596                    0.529135 +- 0.0304823      6      good
chromium@514629                    0.533993 +- 0.029409       6      good
chromium@514637                    0.532911 +- 0.0456075      6      good
chromium@514641                    0.527824 +- 0.0292832      6      good
chromium@514641,v8@67d543ec31      0.524487 +- 0.0130091      6      good
chromium@514641,v8@6bb1d47e6e      0.783723 +- 0.0688346      6      bad       <--
chromium@514641,v8@ac0661b358      0.790348 +- 0.0640938      6      bad
chromium@514641,v8@80cb266c75      0.767939 +- 0.0696338      6      bad
chromium@514642                    0.784614 +- 0.140345       6      bad
chromium@514643                    0.781634 +- 0.0516213      6      bad
chromium@514645                    0.756825 +- 0.0683309      6      bad
chromium@514661                    0.769408 +- 0.114584       6      bad
chromium@514726                    0.781607 +- 0.0824818      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.long_running_idle_gmail_tbmv2

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963323395769281360


For feedback, file a bug with component Speed>Bisection