All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=759636

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=ded941f14aaa603e7a3a60682df9a0608015a24a2856d74b25afaa9789444ad0


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

chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970002214283709824

=== 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_request_start/foreground_tab_request_start
  Change       : 88.04% | 423.5 -> 796.333333333

Revision             Result                  N
chromium@495803      423.5 +- 6.47109        6      good
chromium@495805      427.083 +- 8.19044      6      good
chromium@495806      793.0 +- 9.57209        6      bad       <--
chromium@495807      789.083 +- 11.5578      6      bad
chromium@495810      796.333 +- 24.9691      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/8970002214283709824


For feedback, file a bug with component Speed>Bisection