All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758701

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=fa1a13d9d199b0884844156c133db84bf5d7a753e6aa5ca5b09970bc603d9eec


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

chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970346615066231248

=== Auto-CCing suspected CL author pfeldman@chromium.org ===

Hi pfeldman@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


=== 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_pro_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/pcv1-cold/Vnexpress
  Change       : 42.12% | 187.3905 -> 266.322

Revision             Result                  N
chromium@496123      187.391 +- 21.3716      6      good
chromium@496416      180.145 +- 10.1087      6      good
chromium@496563      179.481 +- 8.26686      6      good
chromium@496600      181.058 +- 13.8817      6      good
chromium@496605      179.207 +- 9.42212      6      good
chromium@496606      178.179 +- 9.7452       6      good
chromium@496607      266.338 +- 40.705       6      bad       <--
chromium@496609      262.471 +- 16.572       6      bad
chromium@496618      265.946 +- 29.5947      6      bad
chromium@496636      271.823 +- 32.903       6      bad
chromium@496709      266.322 +- 18.8687      6      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=Vnexpress loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970346615066231248


For feedback, file a bug with component Speed>Bisection

 Issue 758870  has been merged into this issue.

 Issue 758873  has been merged into this issue.

 Issue 758972  has been merged into this issue.

 Issue 758923  has been merged into this issue.

 Issue 758968  has been merged into this issue.

 Issue 758971  has been merged into this issue.

firstMeaningfulPaintCandidate metric this test relies upon was fixed to be reported post-raster. This affected the metric being gathered, but not the actual platform performance.

Issue 758942 has been merged into this issue.

 Issue 759585  has been merged into this issue.

 Issue 760171  has been merged into this issue.

 Issue 758904  has been merged into this issue.