All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=781544

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f23c2e0bc6a10bcfb5c37c1bd4fe9375f9d12f6cc016326f7d2b824f2e96e72f


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

chromium-rel-mac11
chromium-rel-win10
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963833973295632288

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

Hi dalecurtis@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 : Dale Curtis
  Commit : 3d4d682157f35edd0548cc409aff9a74baf70318
  Date   : Thu Nov 02 01:01:26 2017
  Subject: Update AudioBus perftest. Remove unused converters and add float.

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : media_perftests
  Metric       : audio_bus_from_interleaved/int16_t
  Change       : 3.80% | 15.6047833333 -> 15.0114277778

Revision             Result                   N
chromium@513302      15.6048 +- 0.259263      9      good
chromium@513328      15.553 +- 0.250179       6      good
chromium@513341      15.5557 +- 0.169613      6      good
chromium@513347      15.5634 +- 0.161325      6      good
chromium@513349      15.4846 +- 0.165854      6      good
chromium@513350      14.9543 +- 0.147522      6      bad       <--
chromium@513353      15.0868 +- 0.418703      6      bad
chromium@513404      15.0114 +- 0.863063      9      bad

To Run This Test
  .\src\out\Release\media_perftests.exe --single-process-tests

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963833973295632288


For feedback, file a bug with component Speed>Bisection