All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=787441

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=610562dcca3a115440d361ee8301c9d36eed3f4b94f315b64e50bbaa7bfc07b1


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

chromium-rel-mac-retina
chromium-rel-mac11-pro
chromium-rel-win10
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962311400074460048

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

Suspected Commit
  Author : Nghia Nguyen
  Commit : 564e33d345ee080be36ad0e6b6107afbcd09df4d
  Date   : Tue Nov 07 14:06:23 2017
  Subject: Update wprgo binaries to latest version

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : total:500ms_window:renderer_eqt:v8_max/browse_media/browse_media_pinterest
  Change       : 111.27% | 145.146799943 -> 306.65836881

Revision                                 Result                  N
chromium@515119                          145.147 +- 45.2877      6      good
chromium@515137                          146.898 +- 27.6399      6      good
chromium@515146                          140.387 +- 26.0436      6      good
chromium@515148                          140.647 +- 16.776       6      good
chromium@515148,catapult@a7fb6add75      144.276 +- 27.6264      6      good
chromium@515148,catapult@b33d83ad5d      145.167 +- 28.4793      6      good
chromium@515148,catapult@564e33d345      283.806 +- 52.5348      6      bad       <--
chromium@515148,catapult@c169bba255      263.928 +- 77.4366      6      bad
chromium@515149                          296.171 +- 12.8188      6      bad
chromium@515150                          273.035 +- 72.6159      6      bad
chromium@515154                          306.658 +- 152.404      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=browse.media.pinterest v8.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962311400074460048


For feedback, file a bug with component Speed>Bisection