All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=768337

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=4b5b3be11bfa868a35e06318464c6a002bba69eb07529784aace1e429086ddb1


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967482401216714720

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

Suspected Commit
  Author : Brian White
  Commit : 7ac4e75787ae3b44a33026e4e3671410c81a273c
  Date   : Sun Sep 24 04:33:45 2017
  Subject: Validate histograms around IPC calls on Android.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : thread_times.key_mobile_sites_smooth
  Metric       : thread_total_all_cpu_time_per_frame/http___www.boingboing.net
  Change       : 20.93% | 21.6351911484 -> 26.1637820484

Revision             Result                   N
chromium@503949      21.6352 +- 0.569452      6      good
chromium@503950      21.3699 +- 0.772715      6      good
chromium@503951      26.1638 +- 0.560401      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/8967482401216714720


For feedback, file a bug with component Speed>Bisection