All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=765553

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=5b6d000898ea5b259f40176af5eb601705decaa1d16299afc0717a776fd5abb0


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

chromium-rel-mac11
chromium-rel-mac12

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968402933590141344

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

Suspected Commit
  Author : Hitoshi Yoshida
  Commit : 3e5db563a65e3968d1e336312ae1bbb85e18321d
  Date   : Mon Sep 11 02:31:08 2017
  Subject: FieldTrial: Add field trial configuration for V8ContextSnapshot

Bisect Details
  Configuration: mac_10_12_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:renderer_processes:reported_by_chrome:v8:heap:effective_size_avg/video.html?src_garden2_10s.mp4
  Change       : 10.85% | 3152508.0 -> 3494626.66667

Revision             Result                  N
chromium@500815      3152508 +- 6419.48      6      good
chromium@500823      3157172 +- 28319.5      6      good
chromium@500827      3151792 +- 5957.76      6      good
chromium@500828      3155187 +- 3258.75      6      good
chromium@500829      3491868 +- 6188.32      6      bad       <--
chromium@500831      3494627 +- 1933.77      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=video.html.src.garden2.10s.mp4 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/8968402933590141344


For feedback, file a bug with component Speed>Bisection