All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783724

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=defcad12b950865f6097155f7113818d0fcb0001920eeef1c24fcbb3dbcf912b


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963317784450872944

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

Suspected Commit
  Author : Annie Sullivan
  Commit : 0ea04e064baa8615e5ef9702050ce6a605435c57
  Date   : Fri Nov 03 18:38:38 2017
  Subject: Revert "Add CrashKey to LazyLineBreakIterator on Android"

Bisect Details
  Configuration: android_nexus6_perf_bisect
  Benchmark    : smoothness.key_silk_cases
  Metric       : queueing_durations/masonry.html
  Change       : 29.53% | 1.49147199838 -> 1.05110820712

Revision             Result                    N
chromium@513751      1.49147 +- 0.491902       9      good
chromium@513807      1.49176 +- 0.397848       6      good
chromium@513835      1.45747 +- 0.148308       6      good
chromium@513849      1.4234 +- 0.252146        6      good
chromium@513851      1.41424 +- 0.495013       9      good
chromium@513852      0.952122 +- 0.240659      6      bad       <--
chromium@513853      1.01011 +- 0.357688       6      bad
chromium@513856      1.07598 +- 0.671046       9      bad
chromium@513862      1.03292 +- 0.383359       6      bad
chromium@513972      0.992753 +- 0.249637      6      bad
chromium@514192      1.05111 +- 0.510341       9      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=masonry.html smoothness.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/8963317784450872944


For feedback, file a bug with component Speed>Bisection