All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=757304

(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/8970677683872479056

=== 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       : 1.56% | 3430816.0 -> 3484442.66667

Revision                           Result                  N
chromium@490934                    3430816 +- 525.814      6      good
chromium@491948                    3436533 +- 188.863      6      good
chromium@492075                    3436541 +- 576.629      6      good
chromium@492139                    3436393 +- 692.397      6      good
chromium@492155                    3436232 +- 976.918      6      good
chromium@492159                    3436472 +- 520.185      6      good
chromium@492161                    3436471 +- 727.465      6      good
chromium@492161,v8@5614747680      3436424 +- 485.699      6      good
chromium@492161,v8@2fd5e70a03      3442524 +- 811.892      6      good
chromium@492161,v8@9735d7f109      3442564 +- 797.496      6      good
chromium@492161,v8@0caf1d2029      3442700 +- 404.099      6      good
chromium@492161,v8@05e862f783      3469200 +- 364.33       5      bad       <--
chromium@492162                    3470265 +- 1353.89      6      bad
chromium@492163                    3470071 +- 669.368      6      bad
chromium@492171                    3470148 +- 609.236      6      bad
chromium@492202                    3470067 +- 896.69       6      bad
chromium@492455                    3471560 +- 926.274      6      bad
chromium@492962                    3471949 +- 981.797      6      bad
chromium@494990                    3484443 +- 718.636      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/8970677683872479056


For feedback, file a bug with component Speed>Bisection

=== 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       : 1.56% | 3430816.0 -> 3484442.66667

Revision                           Result                  N
chromium@490934                    3430816 +- 525.814      6      good
chromium@491948                    3436533 +- 188.863      6      good
chromium@492075                    3436541 +- 576.629      6      good
chromium@492139                    3436393 +- 692.397      6      good
chromium@492155                    3436232 +- 976.918      6      good
chromium@492159                    3436472 +- 520.185      6      good
chromium@492161                    3436471 +- 727.465      6      good
chromium@492161,v8@5614747680      3436424 +- 485.699      6      good
chromium@492161,v8@2fd5e70a03      3442524 +- 811.892      6      good
chromium@492161,v8@9735d7f109      3442564 +- 797.496      6      good
chromium@492161,v8@0caf1d2029      3442700 +- 404.099      6      good
chromium@492161,v8@05e862f783      3469200 +- 364.33       5      bad       <--
chromium@492162                    3470265 +- 1353.89      6      bad
chromium@492163                    3470071 +- 669.368      6      bad
chromium@492171                    3470148 +- 609.236      6      bad
chromium@492202                    3470067 +- 896.69       6      bad
chromium@492455                    3471560 +- 926.274      6      bad
chromium@492962                    3471949 +- 981.797      6      bad
chromium@494990                    3484443 +- 718.636      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/8970677683872479056


For feedback, file a bug with component Speed>Bisection