All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783634

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=24a0809b987f80c3b25824e0548d4c256c9b17038f918234ffa71412d44b3efa


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

android-nexus5
android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963323432443999264

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

Suspected Commit
  Author : Justin Novosad
  Commit : 5b07996e178c5f4e153e771d48ab839867fa7440
  Date   : Wed Nov 08 23:26:00 2017
  Subject: Reland: Refactor of Canvas2DLayerBridge resource model

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/http___jarrodoverson.com_static_demos_particleSystem_
  Change       : 16.97% | 50.4993081473 -> 59.0694236099

Revision             Result                   N
chromium@514974      50.4993 +- 1.64075       6      good
chromium@514989      50.1694 +- 1.53322       6      good
chromium@514997      50.7787 +- 1.36852       6      good
chromium@514999      50.5321 +- 2.12424       6      good
chromium@515000      50.8204 +- 1.73898       6      good
chromium@515001      58.8416 +- 0.901034      6      bad       <--
chromium@515004      58.9554 +- 1.54396       6      bad
chromium@515033      58.5619 +- 1.49144       6      bad
chromium@515092      59.0694 +- 0.85975       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http...jarrodoverson.com.static.demos.particleSystem. smoothness.tough_canvas_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963323432443999264


For feedback, file a bug with component Speed>Bisection