All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=786006

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=8a5007c215370d2647b32c16362328321d078b48ebc40c81919d4e4836179e04


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

android-nexus5X
chromium-rel-win10
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962749200251223280

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

Suspected Commit
  Author : Caleb Rouleau
  Commit : 05121b638fb7d738846e17d445d8c7fc7a7d3ce2
  Date   : Wed Nov 15 02:06:57 2017
  Subject: [Telemetry] Repeat MSE test case runs.

Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : media.desktop
  Metric       : cpu_time_percentage_avg/mse.html?media_aac_audio.mp4_h264_video.mp4_waitForPageLoaded_true
  Change       : 102.86% | 0.120744023347 -> 0.248002155934

Revision             Result                    N
chromium@516498      0.120744 +- 0.170381      14      good
chromium@516543      0.144751 +- 0.135846      14      good
chromium@516555      0.130694 +- 0.133325      6       good
chromium@516557      0.115925 +- 0.105333      6       good
chromium@516558      0.282468 +- 0.198513      9       bad       <--
chromium@516561      0.270343 +- 0.191973      9       bad
chromium@516566      0.280749 +- 0.183746      9       bad
chromium@516588      0.248002 +- 0.305008      14      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=mse.html.media.aac.audio.mp4.h264.video.mp4.waitForPageLoaded.true media.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962749200251223280


For feedback, file a bug with component Speed>Bisection