All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775865

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=dac840d179577b67d6d922181358f9729d79ada6263115eee1ce70b615e304dc


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

android-one
android-webview-nexus5X
android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965404182898533440

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964931760060111440

Kicked a bisect on one of the clear regressions on the Nexus 6 in case the 5x bot is having issues: https://chromeperf.appspot.com/buildbucket_job_status/8964931760060111440

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : 7c1b01154a460dec5da40a9c8d5ae4e44eea8e4e
  Date   : Fri Sep 29 11:38:50 2017
  Subject: [heap] Enable concurrent marking on all platforms.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : v8-gc-total_avg/browse_media/browse_media_facebook_photos
  Change       : 74.64% | 0.980413714824 -> 1.71221565531

Revision                           Result                    N
chromium@503829                    0.980414 +- 0.130266      6      good
chromium@505048                    1.02869 +- 0.0625909      6      good
chromium@505353                    1.01478 +- 0.13381        6      good
chromium@505505                    1.06799 +- 0.0878857      6      good
chromium@505547                    1.01091 +- 0.205013       6      good
chromium@505558                    1.02507 +- 0.220876       6      good
chromium@505558,v8@5005a62fe0      1.00726 +- 0.11712        6      good
chromium@505558,v8@7c1b01154a      1.55057 +- 0.258351       6      bad       <--
chromium@505559                    1.53551 +- 0.37577        6      bad
chromium@505560                    1.59479 +- 0.434938       6      bad
chromium@505561                    1.43552 +- 0.517849       6      bad
chromium@505563                    1.48454 +- 0.604474       9      bad
chromium@505568                    1.58808 +- 0.542732       6      bad
chromium@505589                    1.49988 +- 0.354729       6      bad
chromium@505657                    1.4329 +- 0.358319        6      bad
chromium@506266                    1.67725 +- 0.603131       6      bad
chromium@508702                    1.71222 +- 0.370636       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=browse.media.facebook.photos v8.runtimestats.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964931760060111440


For feedback, file a bug with component Speed>Bisection