All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758923

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=8517c060d2629747b22688416280d05e416a1bd52fd237657bb4521227bf2d86


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

chromium-rel-mac11-air

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970291510386439840

=== 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: mac_air_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/TicketMaster
  Change       : 14.81% | 520.358444447 -> 597.412777778

Revision             Result                  N
chromium@496588      520.358 +- 135.046      9       good
chromium@496604      499.607 +- 121.55       9       good
chromium@496606      525.326 +- 275.336      14      good
chromium@496607      609.998 +- 223.817      9       bad       <--
chromium@496608      610.324 +- 225.989      9       bad
chromium@496612      699.085 +- 229.835      6       bad
chromium@496620      642.439 +- 126.89       5       bad
chromium@496651      597.413 +- 222.205      9       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=TicketMaster loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970291510386439840


For feedback, file a bug with component Speed>Bisection