All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=778182

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=83423bab8609caaf5de2637a121ffae86a074007b3ff1aa7052cd42708e049e3


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

chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964767844397847808

=== 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: win_8_perf_bisect
  Benchmark    : smoothness.tough_filters_cases
  Metric       : frame_times/Filter Terrain SVG
  Change       : 4.29% | 44.0362157564 -> 42.1485660966

Revision             Result                   N
chromium@510776      44.0362 +- 1.0718        6      good
chromium@510813      44.3115 +- 1.49854       6      good
chromium@510822      43.8429 +- 0.434663      6      good
chromium@510823      43.6629 +- 0.691024      6      good
chromium@510824      42.2479 +- 1.31386       6      bad       <--
chromium@510825      41.9685 +- 0.893905      6      bad
chromium@510827      42.2598 +- 0.355182      6      bad
chromium@510831      42.2641 +- 0.263653      6      bad
chromium@510849      42.1486 +- 0.784507      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=Filter.Terrain.SVG smoothness.tough_filters_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964767844397847808


For feedback, file a bug with component Speed>Bisection