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Issue 699203 link

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Issue metadata

Status: Duplicate
Merged: issue 699061
Owner: ----
Closed: Mar 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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115.5% regression in media.tough_video_cases at 454421:454537

Project Member Reported by liberato@google.com, Mar 7 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=699203

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglILqpgoM


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

chromium-rel-mac12
Mergedinto: 699061
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : dalecurtis
  Commit : f4a6dbf44108f1855faf5a78d4fb06c349ebd70d
  Date   : Fri Mar 03 00:27:26 2017
  Subject: Replace FFmpegDemuxer thread per element with base::TaskScheduler.

Bisect Details
  Configuration: mac_10_12_perf_bisect
  Benchmark    : media.tough_video_cases
  Metric       : idle_wakeups_renderer/idle_wakeups_renderer
  Change       : 51.40% | 420.955128205 -> 637.33974359

Revision             Result                  N
chromium@454420      420.955 +- 12.1361      6      good
chromium@454450      417.526 +- 15.9798      6      good
chromium@454451      414.083 +- 20.3349      6      good
chromium@454452      632.615 +- 33.029       6      bad       <--
chromium@454454      627.737 +- 28.7437      6      bad
chromium@454458      633.66 +- 27.6985       6      bad
chromium@454465      620.859 +- 63.4256      6      bad
chromium@454479      635.301 +- 33.2373      6      bad
chromium@454537      637.34 +- 27.251        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 media.tough_video_cases

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985754546412698224

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5299531735891968


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

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

Suspected Commit
  Author : dalecurtis
  Commit : f4a6dbf44108f1855faf5a78d4fb06c349ebd70d
  Date   : Fri Mar 03 00:27:26 2017
  Subject: Replace FFmpegDemuxer thread per element with base::TaskScheduler.

Bisect Details
  Configuration: mac_10_12_perf_bisect
  Benchmark    : media.tough_video_cases
  Metric       : idle_wakeups_renderer/idle_wakeups_renderer
  Change       : 51.85% | 419.307692308 -> 636.737179487

Revision             Result                  N
chromium@454420      419.308 +- 18.081       6      good
chromium@454450      416.603 +- 21.5348      6      good
chromium@454451      408.673 +- 45.3236      6      good
chromium@454452      634.808 +- 14.296       6      bad       <--
chromium@454454      633.744 +- 19.4046      6      bad
chromium@454458      625.788 +- 52.8196      6      bad
chromium@454465      638.609 +- 13.7205      6      bad
chromium@454479      631.41 +- 24.55         6      bad
chromium@454537      636.737 +- 33.2481      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 media.tough_video_cases

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985754537512641696

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5868788043481088


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

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