All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=745937

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=ac0e50a0609342d100dc2d3b70d9da6267092b6fc8a9ead042b770c18d2b3de8


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

chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973703768959452752

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

Suspected Commit
  Author : Hajime Hoshi
  Commit : 5d64433a4a096a86544cd6d80f0a18ef066396ce
  Date   : Thu Jul 13 14:50:22 2017
  Subject: Add SharedMemory::mapped_id()

Bisect Details
  Configuration: win_x64_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:browser_process:reported_by_chrome:effective_size_avg/video.html?src_garden2_10s.webm
  Change       : 62.70% | 57182243.5714 -> 93036257.1667

Revision             Result                   N
chromium@486366      57182244 +- 90685.0      6      good
chromium@486374      57181384 +- 107004       6      good
chromium@486375      93057556 +- 239274       6      bad       <--
chromium@486376      93046229 +- 84982.2      6      bad
chromium@486378      93051483 +- 84690.1      6      bad
chromium@486381      93022358 +- 68609.8      6      bad
chromium@486396      93012450 +- 16483.6      6      bad
chromium@486425      93048117 +- 85053.2      6      bad
chromium@486483      93036257 +- 83638.1      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.garden2.10s.webm 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/8973703768959452752


For feedback, file a bug with component Speed>Bisection