All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=785729

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f80d8d5c46659511a1af248f3bc0619c7a753cebcb3098984919f3a65dd6c6de


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

android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac12
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-x64-dual
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962786384160439136

=== 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: winx64ati_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Parse:duration_avg/browse_media/browse_media_pinterest
  Change       : 33.59% | 517.3645 -> 691.1225

Revision                                 Result                  N
chromium@515134                          517.365 +- 142.046      6      good
chromium@515147                          478.495 +- 55.4268      6      good
chromium@515148                          496.127 +- 58.2433      6      good
chromium@515148,catapult@a7fb6add75      466.661 +- 72.1817      6      good
chromium@515148,catapult@b33d83ad5d      478.145 +- 61.8023      6      good
chromium@515148,catapult@564e33d345      664.343 +- 23.7486      6      bad       <--
chromium@515148,catapult@c169bba255      661.453 +- 10.7105      6      bad
chromium@515149                          661.77 +- 17.7672       6      bad
chromium@515151                          662.211 +- 7.62567      5      bad
chromium@515154                          667.572 +- 12.7094      6      bad
chromium@515160                          681.487 +- 131.74       6      bad
chromium@515186                          691.123 +- 119.26       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.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962786384160439136


For feedback, file a bug with component Speed>Bisection