All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758599

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e8f444e2d987a46f47e3d5d83c89f0afdc3af7bcbca4e6db04cdba336b1f51e6


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

chromium-rel-win7-gpu-intel

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970368203200740816

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

Suspected Commit
  Author : Nico Weber
  Commit : 7cd2f6bd73c6a9c6200704e995b18ebb3168ead6
  Date   : Sat Aug 19 04:23:54 2017
  Subject: win: Turn off clang-by-default again for now.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : blink_perf.css
  Metric       : ChangeStyleShallowTree/ChangeStyleShallowTree
  Change       : 13.30% | 12.6303333333 -> 14.31

Revision             Result                    N
chromium@495793      12.6303 +- 0.119077       6      good
chromium@495801      12.6573 +- 0.118293       6      good
chromium@495802      14.3775 +- 0.0860552      6      bad       <--
chromium@495803      14.513 +- 0.157892        6      bad
chromium@495805      14.3383 +- 0.169698       6      bad
chromium@495808      14.31 +- 0.0446542        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 blink_perf.css

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970368203200740816


For feedback, file a bug with component Speed>Bisection