All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788406

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=75e3e5199e6f2f24e64a692cfbe92abf3890d7864c5d44dffa9529c477c6e8d5


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

android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962038028313354288

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

Suspected Commit
  Author : Hans Wennborg
  Commit : 85023f0253e73844e0bdf00f134ddbeeae057aed
  Date   : Tue Nov 21 15:27:34 2017
  Subject: Roll clang 317263:318667.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.canvas
  Metric       : toBlob_duration_jpeg/toBlob_duration_jpeg
  Change       : 8.83% | 847.0735 -> 921.891333333

Revision             Result                  N
chromium@518240      847.074 +- 3.39634      6      good
chromium@518254      841.698 +- 8.42469      6      good
chromium@518256      843.281 +- 5.08715      6      good
chromium@518257      843.692 +- 8.5391       6      good
chromium@518258      965.98 +- 7.62625       6      bad       <--
chromium@518261      966.07 +- 7.13355       6      bad
chromium@518268      921.891 +- 7.76726      6      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

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 blink_perf.canvas

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962038028313354288


For feedback, file a bug with component Speed>Bisection