All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783633

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=61251895d84e44ffe4bac931e4a2539bdd34f0022a9a6a5601d0799f19127067


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

android-nexus5
android-nexus6
android-webview-nexus6
chromium-rel-mac12
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963323447027664416

=== 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_rendering_throughput_put_get_image_data.html
  Change       : 58.32% | 126.714548285 -> 200.611463611

Revision             Result                  N
chromium@514938      126.715 +- 3.77768      6      good
chromium@514981      127.464 +- 4.11425      6      good
chromium@514992      125.275 +- 2.84316      6      good
chromium@514997      125.764 +- 3.53727      6      good
chromium@515000      126.404 +- 4.19109      6      good
chromium@515001      200.171 +- 3.15056      6      bad       <--
chromium@515002      200.72 +- 2.91768       6      bad
chromium@515023      200.611 +- 4.68727      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.rendering.throughput.put.get.image.data.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/8963323447027664416


For feedback, file a bug with component Speed>Bisection