All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=757323

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=764cd2eed96cd532f849ad6b50607b1d592aa66cb8a7e75c721ccee946434f85


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

chromium-rel-mac-retina

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970675998453297712

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

Suspected Commit
  Author : Jakob Kummerow
  Commit : 05e862f78398d8bbeacc7f9e19bbb41c408e709b
  Date   : Fri Aug 04 01:27:42 2017
  Subject: Cache StoreIC-Transition handlers

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/video.html?src_tulip2.m4a_type_audio
  Change       : 1.57% | 3430968.0 -> 3484973.33333

Revision                           Result                  N
chromium@490934                    3430968 +- 406.507      6      good
chromium@491948                    3436467 +- 637.963      6      good
chromium@492075                    3436537 +- 501.06       6      good
chromium@492139                    3436700 +- 1490.83      6      good
chromium@492155                    3436612 +- 930.325      6      good
chromium@492159                    3436687 +- 696.911      6      good
chromium@492161                    3436944 +- 1791.89      6      good
chromium@492161,v8@5614747680      3436833 +- 1620.68      6      good
chromium@492161,v8@2fd5e70a03      3442751 +- 1642.18      6      good
chromium@492161,v8@9735d7f109      3442560 +- 1484.04      6      good
chromium@492161,v8@0caf1d2029      3442539 +- 753.757      6      good
chromium@492161,v8@05e862f783      3469748 +- 2044.61      6      bad       <--
chromium@492162                    3470281 +- 1461.28      6      bad
chromium@492163                    3470161 +- 1678.11      6      bad
chromium@492171                    3470408 +- 1619.09      6      bad
chromium@492202                    3470527 +- 1220.54      6      bad
chromium@492455                    3471975 +- 619.1        6      bad
chromium@492962                    3472005 +- 737.187      6      bad
chromium@494990                    3484973 +- 1314.03      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.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/8970675998453297712


For feedback, file a bug with component Speed>Bisection