All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=773714

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=cb44ea69339f93b51363ee71946eaa48d42077b0f0e8fa709a318f06b1ee640e


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8966017303826404304

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

Suspected Commit
  Author : Christopher Cameron
  Commit : 7ad584b2ad8cc768d46051d9933a3bb5a4ce06d4
  Date   : Mon Oct 09 21:27:21 2017
  Subject: canvas: Fix default values for color space

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/http___ie.microsoft.com_testdrive_Performance_AsteroidBelt_Default.html
  Change       : 107.06% | 16.6962798934 -> 34.570947244

Revision             Result                   N
chromium@507489      16.6963 +- 0.214626      6      good
chromium@507491      16.7309 +- 0.222555      6      good
chromium@507492      34.8826 +- 1.57794       6      bad       <--
chromium@507494      35.1101 +- 1.58782       6      bad
chromium@507498      34.865 +- 1.28836        6      bad
chromium@507507      34.6995 +- 1.95011       6      bad
chromium@507524      34.6683 +- 1.31418       6      bad
chromium@507558      34.5709 +- 0.973643      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=http...ie.microsoft.com.testdrive.Performance.AsteroidBelt.Default.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/8966017303826404304


For feedback, file a bug with component Speed>Bisection