All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=745925

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=df46e4fa738da238a2d61f51fd8807bb7b60f39207bc6632441335ee78a54056


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

chromium-rel-win10

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973705703136027568

=== 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: winx64_10_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       : 65.25% | 55030905.6048 -> 90937342.8333

Revision             Result                   N
chromium@486329      55030906 +- 88898.0      6      good
chromium@486363      55020882 +- 64435.3      6      good
chromium@486372      55012304 +- 37706.5      6      good
chromium@486374      55056967 +- 297070       6      good
chromium@486375      90957950 +- 299296       6      bad       <--
chromium@486376      90898912 +- 53957.1      6      bad
chromium@486380      90930892 +- 286253       6      bad
chromium@486397      90937343 +- 85724.7      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/8973705703136027568


For feedback, file a bug with component Speed>Bisection