All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758952

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=eac081c7685fa8d0f5da74222ba9a2d80445a5d2d2b2f02d7071e693a0739c0e


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

android-nexus7v2

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970287309562917568

=== 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.sync_scroll.key_mobile_sites_smooth
  Metric       : first_gesture_scroll_update_latency/Pinterest
  Change       : 156.10% | 172.834833333 -> 442.632166667

Revision             Result                  N
chromium@496667      172.835 +- 239.07       6      good
chromium@496809      244.137 +- 167.475      6      good
chromium@496845      227.945 +- 195.687      6      good
chromium@496863      293.712 +- 146.585      6      good
chromium@496872      263.752 +- 136.852      6      good
chromium@496876      289.795 +- 232.409      6      good
chromium@496877      150.776 +- 177.685      6      good
chromium@496878      457.942 +- 112.33       6      bad       <--
chromium@496880      445.771 +- 68.7904      6      bad
chromium@496950      442.632 +- 64.0984      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=Pinterest smoothness.sync_scroll.key_mobile_sites_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970287309562917568


For feedback, file a bug with component Speed>Bisection