All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=767951

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0b400e2a61dc66cdb5e5a9783e70932d202f10f11aef866a53f815cb99023276


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

chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967729847572891440

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

Suspected Commit
  Author : Fredrik Hubinette
  Commit : cbd817fb8b417bbe16994b62f31e895cbee7e848
  Date   : Wed Sep 20 21:25:42 2017
  Subject: Benchmark page testing video load time when javascript thread is busy.

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : cpu_time_percentage_avg/cpu_time_percentage_avg
  Change       : 10.18% | 0.210195517067 -> 0.231590912878

Revision             Result                      N
chromium@503208      0.210196 +- 0.00613777      6      good
chromium@503245      0.208441 +- 0.00539722      6      good
chromium@503250      0.205889 +- 0.00486272      6      good
chromium@503251      0.208154 +- 0.00269359      6      good
chromium@503252      0.230467 +- 0.00278598      6      bad       <--
chromium@503254      0.23242 +- 0.00642041       6      bad
chromium@503263      0.235382 +- 0.00384722      6      bad
chromium@503281      0.231591 +- 0.00585512      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests media.tough_video_cases_tbmv2

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967729847572891440


For feedback, file a bug with component Speed>Bisection