All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=752057

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9ae9ac15294fd3ec09a2f4d75c2d79740b68ef456d3046e01fef1fe997a64201


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

chromium-rel-win10
chromium-rel-win7-dual
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/8972283309284902032

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

Suspected Commit
  Author : Hans Wennborg
  Commit : d2c91228a51bdf37ae3b2e501fb53c0528f1629c
  Date   : Fri Jul 28 20:11:05 2017
  Subject: win: Set is_clang=true by default

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : V8 C++:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 17.37% | 1496.303 -> 1756.26

Revision             Result                  N
chromium@490421      1496.3 +- 46.2798       6      good
chromium@490459      1468.77 +- 104.657      6      good
chromium@490478      1477.52 +- 87.2197      6      good
chromium@490488      1489.8 +- 79.9519       6      good
chromium@490493      1467.64 +- 55.4065      6      good
chromium@490494      1726.0 +- 136.604       6      bad       <--
chromium@490495      1717.87 +- 80.4294      6      bad
chromium@490497      1756.26 +- 106.123      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.social.facebook.infinite.scroll 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/8972283309284902032


For feedback, file a bug with component Speed>Bisection

Please stop duping everything against the media_perftests bug.