All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758974

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d87b9b9586d0597b183e293042efc51ec2f7469023a1df097e7b19a9e948e9fb


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

android-nexus7v2

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970285522538843280

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

Suspected Commit
  Author : Brian White
  Commit : 7662ff8cb53121cd4d8916007d430b36efd45895
  Date   : Thu Aug 24 00:03:13 2017
  Subject: Validate histograms before and after each task on Android.

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : first_gesture_scroll_update_latency/Weather.com
  Change       : 200.75% | 26.9892222222 -> 81.1696666667

Revision             Result                  N
chromium@496667      26.9892 +- 39.2001      9      good
chromium@496809      29.9775 +- 16.0221      6      good
chromium@496845      38.4465 +- 30.0797      6      good
chromium@496863      27.8625 +- 16.7595      6      good
chromium@496872      29.5455 +- 14.3575      6      good
chromium@496876      19.591 +- 13.5482       6      good
chromium@496877      22.1683 +- 20.2608      6      good
chromium@496878      124.594 +- 60.3983      6      bad       <--
chromium@496880      97.8205 +- 62.1834      6      bad
chromium@496950      81.1697 +- 81.1277      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=Weather.com smoothness.top_25_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970285522538843280


For feedback, file a bug with component Speed>Bisection