All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=778135

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6dca6845b1b0289940c9f2909a50251cc1dd63e8b387dfb1b7706ac2471d4916


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

chromium-rel-win10
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964781298741633200

=== Auto-CCing suspected CL author hans@chromium.org ===

Hi hans@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


=== 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: winx64intel_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : V8 C++:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 16.88% | 1678.358 -> 1961.65266667

Revision             Result                  N
chromium@510764      1678.36 +- 64.3695      6      good
chromium@510794      1644.46 +- 15.5501      6      good
chromium@510809      1647.69 +- 41.6712      6      good
chromium@510817      1680.19 +- 59.5609      6      good
chromium@510821      1657.37 +- 46.9564      6      good
chromium@510823      1647.44 +- 34.3942      6      good
chromium@510824      1961.65 +- 179.669      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/8964781298741633200


For feedback, file a bug with component Speed>Bisection

 Issue 778081  has been merged into this issue.

 Issue 778187  has been merged into this issue.

 Issue 778184  has been merged into this issue.

 Issue 778180  has been merged into this issue.

 Issue 778179  has been merged into this issue.

 Issue 778182  has been merged into this issue.

For reference,  bug 757342  tracks all the regressions that we got when we reverted the clang switch the last time. So the things on that bug should all be progressions this time.

The runtimestats thing was reported last time in  bug 752057 , but the dupes weren't.

 Issue 778183  has been merged into this issue.

 Issue 778308  has been merged into this issue.

 Issue 778311  has been merged into this issue.

https://chromeperf.appspot.com/group_report?rev=510824 is the perf dashboard for the switch.

 Issue 778600  has been merged into this issue.

 Issue 778593  has been merged into this issue.

 Issue 778592  has been merged into this issue.

 Issue 778589  has been merged into this issue.

 Issue 778591  has been merged into this issue.

 Issue 778594  has been merged into this issue.

 Issue 778595  has been merged into this issue.

 Issue 778612  has been merged into this issue.

 Issue 778662  has been merged into this issue.

 Issue 778678  has been merged into this issue.

 Issue 778662  has been merged into this issue.

 Issue 780184  has been merged into this issue.

 Issue 781200  has been merged into this issue.

 Issue 780187  has been merged into this issue.

 Issue 782181  has been merged into this issue.

 Issue 784847  has been merged into this issue.

Issue 784848 has been merged into this issue.