All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784425

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=c33caff6f5050c1fec0b35203b09a8b9a53b4d892792061a8afc456f98aea8c3


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963024403193630496

=== 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    : thread_times.tough_scrolling_cases
  Metric       : thread_total_all_cpu_time_per_frame/canvas_10000_pixels_per_second
  Change       : 2.66% | 22.0209923201 -> 22.6075922751

Revision             Result                    N
chromium@514974      22.021 +- 0.274971        6      good
chromium@514989      22.0686 +- 0.198818       6      good
chromium@514997      21.869 +- 0.139675        6      good
chromium@514999      21.9039 +- 0.159396       6      good
chromium@515000      21.9299 +- 0.148802       6      good
chromium@515001      22.4201 +- 0.304374       6      bad       <--
chromium@515004      22.5335 +- 0.0885043      6      bad
chromium@515033      22.5961 +- 0.252181       6      bad
chromium@515092      22.6076 +- 0.284567       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=canvas.10000.pixels.per.second thread_times.tough_scrolling_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963024403193630496


For feedback, file a bug with component Speed>Bisection