All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783687

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b05fdde179dcb35616a5e1f5cd2bda355e5abcf4e9287ae334aee5a11a8a62e8


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

android-nexus5
android-nexus7v2
android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963319651014965792

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : 6bb1d47e6e82f75ead36cdab209afc5dafa8329c
  Date   : Tue Nov 07 13:11:10 2017
  Subject: [heap] Re-enable concurrent marking.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : thread_times.key_idle_power_cases
  Metric       : thread_total_all_cpu_time_per_second/animated-gif.html
  Change       : 26.98% | 0.172698537061 -> 0.219287192532

Revision                           Result                      N
chromium@514608                    0.172699 +- 0.00496521      6      good
chromium@514631                    0.171652 +- 0.0058093       6      good
chromium@514637                    0.170881 +- 0.00898074      6      good
chromium@514640                    0.170915 +- 0.00705008      6      good
chromium@514641                    0.169447 +- 0.0051519       6      good
chromium@514641,v8@67d543ec31      0.171717 +- 0.00582537      6      good
chromium@514641,v8@6bb1d47e6e      0.218833 +- 0.00866         6      bad       <--
chromium@514641,v8@ac0661b358      0.219365 +- 0.0108842       6      bad
chromium@514641,v8@80cb266c75      0.223732 +- 0.0100346       6      bad
chromium@514642                    0.218669 +- 0.0150909       6      bad
chromium@514653                    0.214801 +- 0.0212135       6      bad
chromium@514697                    0.219287 +- 0.0190625       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=animated.gif.html thread_times.key_idle_power_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963319651014965792


For feedback, file a bug with component Speed>Bisection