All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=744732

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=2e74cbb7d43407e656a00555058ceef2ed3925ff784e3a61a2f3a28b98873e91


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973799163338520096

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : 057d5553e4524a7726b2e7d5ecfef85289379000
  Date   : Fri Jul 14 04:07:29 2017
  Subject: cc: Dump more state in begin main frame hang crash key.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : thread_times.key_silk_cases
  Metric       : thread_renderer_compositor_cpu_time_per_frame/thread_renderer_compositor_cpu_time_per_frame
  Change       : 7.51% | 3.75129361422 -> 4.03298592291

Revision             Result                    N
chromium@486648      3.75129 +- 0.0400149      6      good
chromium@486664      3.75707 +- 0.0779485      6      good
chromium@486668      3.76449 +- 0.0507277      6      good
chromium@486669      3.76876 +- 0.052186       6      good
chromium@486670      4.0489 +- 0.102081        6      bad       <--
chromium@486672      4.06615 +- 0.0964815      6      bad
chromium@486680      4.03263 +- 0.0246393      6      bad
chromium@486713      4.03299 +- 0.0672945      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 thread_times.key_silk_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973799163338520096


For feedback, file a bug with component Speed>Bisection