All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=773726

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=2a53e5079560e2845f6892b0de02c2cb7ab9830bf60d604a32111e0de10ff027


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

android-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8966014135649406192

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

Suspected Commit
  Author : Khushal
  Commit : 051a012c57a3fdfd6c933ec3df1c0e60d247a73a
  Date   : Fri Oct 06 04:42:46 2017
  Subject: perf: Enable field trial testing for image animations in cc.

Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : smoothness.sync_scroll.key_mobile_sites_smooth
  Metric       : mean_input_event_latency/http___www.boingboing.net
  Change       : 64.17% | 24.1938333333 -> 39.7185

Revision             Result                  N
chromium@506731      24.1938 +- 4.61271      6      good
chromium@506922      24.0483 +- 6.52398      9      good
chromium@506946      23.4914 +- 4.40678      9      good
chromium@506958      23.8474 +- 4.8483       9      good
chromium@506964      23.51 +- 3.59726        9      good
chromium@506967      23.5481 +- 6.73341      9      good
chromium@506968      24.2708 +- 5.16388      6      good
chromium@506969      40.8612 +- 4.45615      6      bad       <--
chromium@506970      37.8886 +- 18.3931      9      bad
chromium@507017      41.2757 +- 4.82243      6      bad
chromium@507112      39.7185 +- 4.618        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=http...www.boingboing.net 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/8966014135649406192


For feedback, file a bug with component Speed>Bisection