All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=741911

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=35732d2997027431cd3f5c86399a426c165a2a0e330ec14a7539350e8cb4d531


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

chromium-rel-win7-gpu-ati

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974235696371321376

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

Suspected Commit
  Author : Marc Treib
  Commit : da2086682fef5cc44b539dc4bdc63af380e2988b
  Date   : Tue Jul 11 09:16:07 2017
  Subject: Fieldtrial testing config for CaptureThumbnailOnLoadFinished

Bisect Details
  Configuration: winx64ati_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:all_processes:reported_by_chrome:gpu:effective_size_avg/video.html?src_garden2_10s.mp4_seek
  Change       : 11.01% | 38092059.5556 -> 42286427.5556

Revision             Result                    N
chromium@485549      38092060 +- 13258948      9      good
chromium@485565      37422136 +- 12922396      6      good
chromium@485567      39664924 +- 988607        9      good
chromium@485568      42402936 +- 13346194      9      bad       <--
chromium@485569      43975800 +- 0.0           6      bad
chromium@485573      43975800 +- 0.0           6      bad
chromium@485581      43975800 +- 0.0           6      bad
chromium@485612      42286428 +- 13258948      9      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 --story-filter=video.html.src.garden2.10s.mp4.seek 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/8974235696371321376


For feedback, file a bug with component Speed>Bisection