All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783635

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=ac164b58dc4a7b4b38052e7cfd19089686c049e1fa0ccce9ff0601b04a3a3f42


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

android-nexus5
android-nexus6
android-webview-nexus6
chromium-rel-win7-gpu-ati

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963323419068249920

=== 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_webview_nexus6_aosp_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/tough_canvas_cases_canvas_toBlob.html
  Change       : 1.79% | 19.0096687286 -> 18.6696984217

Revision             Result                    N
chromium@514938      19.0097 +- 0.105331       6      good
chromium@514981      18.9906 +- 0.0922551      6      good
chromium@514992      19.0386 +- 0.13789        6      good
chromium@514997      19.0406 +- 0.0832208      6      good
chromium@515000      18.9961 +- 0.137303       6      good
chromium@515001      18.6251 +- 0.153208       6      bad       <--
chromium@515002      18.653 +- 0.0672663       6      bad
chromium@515023      18.6697 +- 0.0961537      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=tough.canvas.cases.canvas.toBlob.html 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/8963323419068249920


For feedback, file a bug with component Speed>Bisection