All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783906

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b1306be7f6f6a345e4268f66a03e909ea1c97e7bbecb1e38fa994862730c3d0f


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

android-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963282344779714144

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

Suspected Commit
  Author : Caleb Rouleau
  Commit : 5daa21ce99f8f70abe1202689a510d9f03e5a3e1
  Date   : Wed Nov 08 23:25:07 2017
  Subject: Have pages edit grouping keys themselves.

Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : loading.mobile
  Metric       : timeToFirstMeaningfulPaint_avg/cold_Regular-3G/DevOpera
  Change       : 99.18% | 29313.2028333 -> 239.286

Revision             Result                  N
chromium@514966      29313.2 +- 549.648      6      good
chromium@514996      29305.5 +- 1564.82      6      good
chromium@514998      29372.7 +- 433.497      6      good
chromium@514999      236.481 +- 52.1802      6      bad       <--
chromium@515000      230.852 +- 37.6534      6      bad
chromium@515004      254.457 +- 52.7533      6      bad
chromium@515011      231.068 +- 39.1129      6      bad
chromium@515026      231.822 +- 41.5037      6      bad
chromium@515085      239.286 +- 51.7683      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=DevOpera loading.mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963282344779714144


For feedback, file a bug with component Speed>Bisection