All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=747880

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=c35db035948d5c331ce95b205416bd69fe53780c15c4566c2f5ce25634da13ee


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

android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973192269956499776

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

Suspected Commit
  Author : perryuwang
  Commit : 82496fc9f112ba27d007630b91902814d1b24a90
  Date   : Sat Jul 15 01:59:59 2017
  Subject: Update GpuPreferences when running GPU thread inside browser process.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : smoothness.gpu_rasterization.tough_path_rendering_cases
  Metric       : frame_times/IE Chalkboard
  Change       : 4.18% | 59.8973377812 -> 62.3991659834

Revision             Result                   N
chromium@486073      59.8973 +- 0.419142      6      good
chromium@486875      59.8883 +- 0.769076      6      good
chromium@486926      60.0874 +- 0.873617      6      good
chromium@486951      59.7743 +- 0.465311      6      good
chromium@486958      60.0571 +- 0.929471      6      good
chromium@486961      59.8421 +- 1.02899       6      good
chromium@486962      59.4423 +- 0.946042      6      good
chromium@486963      62.1086 +- 1.13545       6      bad       <--
chromium@486964      61.8412 +- 1.13751       6      bad
chromium@486976      61.8411 +- 0.707347      6      bad
chromium@487076      61.8851 +- 0.655989      6      bad
chromium@487276      62.0621 +- 0.925499      6      bad
chromium@487676      62.3992 +- 0.788375      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=IE.Chalkboard smoothness.gpu_rasterization.tough_path_rendering_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973192269956499776


For feedback, file a bug with component Speed>Bisection