All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=762175

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=efd8e63082c8dd6540d3a054494fd9b538349c43d04ccb8e93b6b51f6b7378db


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969257679495451792

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

Suspected Commit
  Author : Robert Sesek
  Commit : 5cd8eef498e28e1aacb9109645c001bbbfe1bc26
  Date   : Mon Aug 28 19:51:25 2017
  Subject: [Mac] A potential fix for WaitableEvent::WaitMany on macOS 10.11.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : blink_perf.canvas
  Metric       : upload-video-to-texture/upload-video-to-texture
  Change       : 1.39% | 4541.21186783 -> 4604.29979343

Revision             Result                  N
chromium@497780      4541.21 +- 31.6271      6      good
chromium@497839      4543.44 +- 34.7104      9      good
chromium@497847      4534.83 +- 13.6264      6      good
chromium@497849      4538.04 +- 20.0263      6      good
chromium@497850      4608.44 +- 23.6149      6      bad       <--
chromium@497851      4613.44 +- 11.6046      6      bad
chromium@497854      4607.76 +- 14.1968      6      bad
chromium@497869      4581.3 +- 182.39        9      bad
chromium@497898      4604.3 +- 22.305        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 blink_perf.canvas

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969257679495451792


For feedback, file a bug with component Speed>Bisection