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Issue 699660 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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95.6% regression in tab_switching.tough_energy_cases at 454354:454452

Project Member Reported by benhenry@google.com, Mar 8 2017

Issue description

Bisect coming.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=699660

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglPD5qgoM


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

chromium-rel-mac11-pro
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_pro_perf_bisect
  Benchmark    : tab_switching.tough_energy_cases
  Metric       : idle_wakeups_total/idle_wakeups_total
  Change       : 175.11% | 992.5 -> 2730.5

Revision             Result                  N
chromium@454353      992.5 +- 14.0535        6      good
chromium@454403      989.667 +- 54.1233      6      good
chromium@454428      996.833 +- 26.4355      6      good
chromium@454440      1011.17 +- 26.511       6      good
chromium@454446      911.0 +- 410.648        6      good
chromium@454449      997.5 +- 30.749         6      good
chromium@454451      966.0 +- 162.302        6      good
chromium@454452      2730.5 +- 1076.57       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 tab_switching.tough_energy_cases

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985661933146083504

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6652960353812480


| 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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