All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=705616

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LTWugkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7JT2rgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LTCqwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7KuQvgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7PC5qwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrPj14gkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7JS9oQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrK-MqAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7JLktAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrKKymAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrLrQ_wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrLrv9AsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7Mb4qgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7ICO-woM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LD8sAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrN2vswoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJ3p4AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrP6OsQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7ITu5QkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrMmL9QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrK6YnwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LzQ9wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJ29sQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrIvFvwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7PrEtgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrPj14goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7O7qtwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJ6ouwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7PrEtgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgzLOPrggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrN65tAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJn7sgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgzOX70AkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJ32vgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrMbxrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJ68pgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrPf9qQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrK6Y7wsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrO73qgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrI7JlQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LrfpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrMS6-AsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrI7JlQgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrLzF6gsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7MCw_wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7Ny9uwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7Nz2swkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7KD47QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrM704wkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrOf38ggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrPPWvQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7ITu5QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7ITu5QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7KTOsQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrMbmtQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrLeIvQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7MTrtgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrNqnrgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrMS6-AoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrM704woM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJe8ugsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LzMrgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7KD47QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJr65AsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7ODloAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrP79uQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7Lje_QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LyV8AoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrNOnjgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7OTwtQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7PqOvgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7PqSrwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7OTsrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7LrhsgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrN7DrQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrK2D5QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrNOnjgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrIf4sAgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7KTZqAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7MLxpAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJmWrQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7MKYsQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgzPTShAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrNrp5goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJXQkggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrL_X8QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7MK7rAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7NrysAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrPOirAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrK67uQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrPO4tQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgzMeKiQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7JDYuQoM


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

android-nexus5X
android-nexus7v2
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8983944436074237760

TL;DR:

a surprisingly small increase in memory (1-2 kb, if the units in the dashboard are correct.)
idle wakeups go down by a good 15-20%
seek time for webm go up by 10-20%

The seek time seems bad, and there doesn't seem to be much data to back up
any improvements. Maybe I should revert it, add some tests that would show
improvements and then try submit it again?

Hmm, did you click show improvements at the top right? I saw quite a few.

Nope, missed that. Doesn't seem to do anything though.
(I follow the "All graphs for this bug" link, and then click that button.)

The "Original alerts at time of bug-filing" link doesn't work, I guess it's too long.

https://chromeperf.appspot.com/group_report?rev=459565 should work.

Interesting, summarizing this link:

Major improvements for "buffering_time". (20-650%)  (Why is this negative??)
clockless video playback improves (2-13 %)
idle_wakup_renderer improves (30-60%)
time to play improves across the board (10-30%)
seek improves in more cases than it regresses (-20 - +40%)

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

Hi hubbe@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 : hubbe
  Commit : 83bbe324e42ebe5b1205d6caeb1ea4149bad31f1
  Date   : Fri Mar 24 21:48:44 2017
  Subject: Buffer 2 seconds of data in the ffmpeg demuxer.

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : media.android.tough_video_cases
  Metric       : vm_private_dirty_delta/crowd.wav_renderer
  Change       : 26.98% | 2260.66666667 -> 2870.66666667

Revision             Result                  N
chromium@459484      2260.67 +- 66.3124      6      good
chromium@459529      2264.67 +- 25.5604      6      good
chromium@459551      2249.33 +- 58.697       6      good
chromium@459562      2263.33 +- 49.1257      6      good
chromium@459564      2267.33 +- 61.0355      6      good
chromium@459565      2876.0 +- 70.6541       6      bad       <--
chromium@459568      2865.33 +- 57.3178      6      bad
chromium@459573      2870.67 +- 59.2396      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests media.android.tough_video_cases

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8983944436074237760

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5687071785615360


| 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!

 Issue 710130  has been merged into this issue.