All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=778081

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=aa281b7b854645e2ff6121b64d2fcacec5101d53c8afd32338d46990fbcba359


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

chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964802057044219552

Suspecting "win: Re-enable Clang by default"

No ANGLE rolls in regression range.

=== 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: winx64nvidia_perf_bisect
  Benchmark    : angle_perftests
  Metric       : Bindings_gl_100_objects_allocated_at_initialization/score
  Change       : 5.25% | 2584.11111111 -> 2448.33333333

Revision             Result                  N
chromium@510799      2584.11 +- 168.08       9      good
chromium@510821      2625.67 +- 120.139      6      good
chromium@510823      2641.67 +- 95.0649      6      good
chromium@510824      2436.17 +- 48.3201      6      bad       <--
chromium@510827      2446.0 +- 22.891        6      bad
chromium@510832      2434.0 +- 67.0522       6      bad
chromium@510843      2433.33 +- 73.8738      6      bad
chromium@510886      2448.33 +- 22.701       6      bad

To Run This Test
  .\src\out\Release_x64\angle_perftests.exe --test-launcher-print-test-stdio=always --test-launcher-jobs=1

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964802057044219552


For feedback, file a bug with component Speed>Bisection