All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783645

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=563a2d9b0532effaca78b9b6d9be6bf95245786aa88bf528cb40204da13178ce


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963323276642455200

=== 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_filters_cases
  Metric       : frame_times/IE PirateMark
  Change       : 11.69% | 42.7375030326 -> 47.7347737433

Revision             Result                   N
chromium@514974      42.7375 +- 0.78917       6      good
chromium@514989      42.3146 +- 1.37412       6      good
chromium@514997      42.5266 +- 0.863823      6      good
chromium@514999      42.9279 +- 1.26569       6      good
chromium@515000      42.9207 +- 0.731694      6      good
chromium@515001      47.5036 +- 1.0269        6      bad       <--
chromium@515004      47.3173 +- 0.709953      6      bad
chromium@515033      47.8854 +- 0.603417      6      bad
chromium@515092      47.7348 +- 1.50881       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=IE.PirateMark smoothness.tough_filters_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963323276642455200


For feedback, file a bug with component Speed>Bisection