All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=782181

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0f1e25b76f6b2fb17891c5e75a81c5d92b5d826c261b93d451c79d668ea7af89


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

chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963589832708196112

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

Suspected Commit
  Author : Hans Wennborg
  Commit : 22525134c75ca2a005997a717f6887a23af86210
  Date   : Mon Oct 23 17:10:25 2017
  Subject: win: Re-enable Clang by default

Bisect Details
  Configuration: winx64ati_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : V8-Only:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 7.99% | 4003.17883333 -> 4323.0775

Revision             Result                  N
chromium@510778      4003.18 +- 50.8698      6      good
chromium@510821      4007.46 +- 86.2307      6      good
chromium@510823      4000.27 +- 102.664      6      good
chromium@510824      4304.55 +- 83.8349      6      bad       <--
chromium@510827      4292.69 +- 192.932      6      bad
chromium@510832      4331.95 +- 219.876      6      bad
chromium@510843      4326.23 +- 154.03       6      bad
chromium@510864      4323.08 +- 152.975      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/8963589832708196112


For feedback, file a bug with component Speed>Bisection