All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758972

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=46eea33ccbdbc8a7800bc3b91d4af6f94fcd722f35e982b3f00b524df6d7766e


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970285635186083168

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

Suspected Commit
  Author : Pavel Feldman
  Commit : 9ce7836fdec98fde42fc61347c4161077dbea0fc
  Date   : Wed Aug 23 07:07:21 2017
  Subject: DevTools: introduce lifecycle events reported over the page domain.

Bisect Details
  Configuration: android_nexus6_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : timeToFirstMeaningfulPaint_avg/background_media/background_media_imgur
  Change       : 27.85% | 339.249333333 -> 433.716666667

Revision             Result                  N
chromium@496588      339.249 +- 97.9107      6      good
chromium@496598      341.558 +- 124.526      9      good
chromium@496603      339.35 +- 100.133       9      good
chromium@496605      351.972 +- 105.619      9      good
chromium@496606      342.075 +- 66.8339      6      good
chromium@496607      432.188 +- 112.639      9      bad       <--
chromium@496625      422.944 +- 66.9548      6      bad
chromium@496661      433.717 +- 40.4804      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=background.media.imgur 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/8970285635186083168


For feedback, file a bug with component Speed>Bisection