All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758576

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=1eae76dcbc6031fa1d9f9704295d2c998671ac6cc0b574adf6dca3b84284056a


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

chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970370041574126784

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

Suspected Commit
  Author : Greg Kerr
  Commit : 9705b7aaabf4c81d4e9cb13174338df9bde61cc4
  Date   : Tue Aug 15 19:42:42 2017
  Subject: Enable Finch Trial Test for MacV2Sandbox.

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-warm/amazon.co.jp
  Change       : 7.56% | 352.334111113 -> 378.961999999

Revision             Result                  N
chromium@494484      352.334 +- 9.90204      9      good
chromium@494493      352.527 +- 7.78493      6      good
chromium@494498      355.281 +- 14.4316      6      good
chromium@494500      342.31 +- 35.0862       6      good
chromium@494501      348.609 +- 30.778       6      good
chromium@494502      385.393 +- 8.21921      6      bad       <--
chromium@494519      381.612 +- 3.52796      6      bad
chromium@494552      381.486 +- 6.6787       6      bad
chromium@494619      388.482 +- 4.66487      6      bad
chromium@494753      378.962 +- 37.4156      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=amazon.co.jp loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970370041574126784


For feedback, file a bug with component Speed>Bisection