All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=747526

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=42e5cf86700767e420d230dbbb302967afd377f032560a843e0e429c930a0443


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

chromium-rel-win7-gpu-intel

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973432998238759968

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

Suspected Commit
  Author : Hajime Hoshi
  Commit : 52448951331fb305cd6342b4fc84542dc4d60d62
  Date   : Thu Jul 20 09:30:57 2017
  Subject: Enable new ownership edges for base::SharedMemory

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:all_processes:reported_by_chrome:sharedbitmap:effective_size_avg/video.html?src_smpte_3840x2160_60fps_vp9.webm_seek
  Change       : 582995.65% | 5888.0 -> 34332672.0

Revision             Result               N
chromium@488141      5888.0 +- 0.0        6      good
chromium@488168      5888.0 +- 0.0        6      good
chromium@488172      5888.0 +- 0.0        6      good
chromium@488173      5888.0 +- 0.0        6      good
chromium@488174      34332672 +- 0.0      6      bad       <--
chromium@488175      34332672 +- 0.0      6      bad
chromium@488181      34332672 +- 0.0      6      bad
chromium@488194      34332672 +- 0.0      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 --story-filter=video.html.src.smpte.3840x2160.60fps.vp9.webm.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/8973432998238759968


For feedback, file a bug with component Speed>Bisection