All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=762281

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=89ee7bcd93cd96e519822ad8f8679ebdfb6a31937564591b63282007e9a2eee5


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

android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969252680789941280

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

Suspected Commit
  Author : Khushal
  Commit : 7875d555052d5faeb68ccc586a3be2d183b2c215
  Date   : Wed Aug 30 19:40:12 2017
  Subject: cc: Only checker images required for pending tree activation.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : thread_times.key_mobile_sites_smooth
  Metric       : thread_raster_cpu_time_per_frame/http___www.boingboing.net
  Change       : 8.85% | 0.777860212651 -> 0.846693942238

Revision             Result                      N
chromium@498560      0.77786 +- 0.0190498        6      good
chromium@498567      0.785008 +- 0.023998        6      good
chromium@498569      0.784509 +- 0.0281041       6      good
chromium@498570      0.772082 +- 0.0317603       6      good
chromium@498571      0.858377 +- 0.00682071      6      bad       <--
chromium@498574      0.850341 +- 0.01402         6      bad
chromium@498588      0.841274 +- 0.0207047       6      bad
chromium@498615      0.846694 +- 0.0209174       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...www.boingboing.net thread_times.key_mobile_sites_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969252680789941280


For feedback, file a bug with component Speed>Bisection