All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=781253

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f834c4e8efcab97fd02132542741238c6a836037cd55d884e98ec6cf39b26ceb


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

android-nexus5
android-nexus5X
android-webview-nexus5X
android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963934647737705808

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

Suspected Commit
  Author : Koji Ishii
  Commit : 811fe6a25ddee5065812bf50733de963e58832cb
  Date   : Tue Oct 31 14:34:37 2017
  Subject: Add CrashKey to LazyLineBreakIterator on Android

Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : total:500ms_window:renderer_eqt_max/browse_social/browse_social_tumblr_infinite_scroll
  Change       : 221.67% | 190.678538067 -> 613.359166667

Revision             Result                  N
chromium@512746      190.679 +- 108.3        6      good
chromium@512790      159.872 +- 28.9572      6      good
chromium@512812      276.224 +- 355.143      9      good
chromium@512823      313.638 +- 244.882      6      good
chromium@512824      300.245 +- 159.349      6      good
chromium@512825      646.457 +- 319.34       6      bad       <--
chromium@512826      599.381 +- 242.65       6      bad
chromium@512829      569.933 +- 183.758      6      bad
chromium@512834      613.359 +- 288.789      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.social.tumblr.infinite.scroll system_health.common_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963934647737705808


For feedback, file a bug with component Speed>Bisection