All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775283

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=2d2fb53e638586feeee2bea00151ee3405d1318464ac2899a490629c53559a5d


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965533020660103456

=== BISECT JOB RESULTS ===
Bisect was unable to run to completion

The bisect was able to narrow the range, you can try running with:
  good_revision: f097403ad0a17bb610823929b3a0a42c8afb9b3b
  bad_revision : f5443e092d1303656080785099b87e9124f6268e

If failures persist contact the team (see below) and report the error.


Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/video.html?src_tulip2.m4a_type_audio
  Change       : 5.48% | 3249854.66667 -> 3427856.0

Revision             Result                  N
chromium@508763      3249855 +- 319501       6      good
chromium@508825      3308388 +- 958.115      6      good
chromium@508856      3327721 +- 1165.01      9      good
chromium@508864      3328034 +- 904.869      9      good
chromium@508866      3328212 +- 578.301      6      good
chromium@508868      3308229 +- 318.329      6      bad
chromium@508872      3376276 +- 433096       9      bad
chromium@508887      3427856 +- 1838.33      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.tulip2.m4a.type.audio media.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965533020660103456


For feedback, file a bug with component Speed>Bisection

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965465319706372224

=== Auto-CCing suspected CL author oshima@chromium.org ===

Hi oshima@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Mitsuru Oshima
  Commit : addcbedae6fd53756ae328e4f491e6fcc6958cdd
  Date   : Fri Oct 13 23:38:13 2017
  Subject: Fix mash crash in ArcRotationLockBridge

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/video.html?src_tulip2.m4a_type_audio
  Change       : 5.48% | 3249317.33333 -> 3376633.77778

Revision             Result                  N
chromium@508763      3249317 +- 321874       6       good
chromium@508825      3308244 +- 1112.36      6       good
chromium@508856      3301152 +- 358481       14      good
chromium@508864      3301303 +- 358589       14      good
chromium@508866      3327904 +- 807.96       6       good
chromium@508867      3308185 +- 718.257      6       bad       <--
chromium@508868      3308141 +- 1020.54      6       bad
chromium@508872      3329229 +- 705397       14      bad
chromium@508887      3376634 +- 431252       9       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.tulip2.m4a.type.audio media.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965465319706372224


For feedback, file a bug with component Speed>Bisection

The CL is CrOS only and should have no effect on mac.

add caleb. is this bug still repro or just a once time glitch? as per c#6, the bisect found CL is not the reason cause this regression.

+simonhatch@ note that looks like bisect was wrong here.