All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=759637

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=ebae08559ea6677e075bf833f736290d0ad3d128e9db8dece9ee2dfa0e869c24


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

chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970002199267822864

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

Suspected Commit
  Author : Zhenyao Mo
  Commit : 74b0491b36d22d377e16208fc92d291bfbc2c10e
  Date   : Sat Aug 19 06:53:17 2017
  Subject: Move dynamic GPU switching to GPU process.

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : startup.warm.blank_page
  Metric       : foreground_tab_load_complete/foreground_tab_load_complete
  Change       : 86.88% | 428.416666667 -> 800.625

Revision             Result                  N
chromium@495803      428.417 +- 13.0224      6      good
chromium@495805      441.0 +- 10.3017        6      good
chromium@495806      801.458 +- 12.3157      6      bad       <--
chromium@495807      793.208 +- 23.9542      6      bad
chromium@495810      800.625 +- 26.9786      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=5 --also-run-disabled-tests startup.warm.blank_page

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970002199267822864


For feedback, file a bug with component Speed>Bisection