All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=731872

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5p2wkgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgloiX7ggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgluiVoAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uvy5goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5suT6AoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vrPgwgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5obt5goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgluKu5woM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5p3MswkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglrLavwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5r30rQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uujoAgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rfS5QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgluiBvgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5obt5ggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgltCtygoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglrLavwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tbnrgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uujwAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqK8pQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglv7G-AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglszGqwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tmxywsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5qLf2QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglrKsrgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgloygiAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglpboswoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tmxywkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqad4AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglv7GuAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5v2YpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vvHqgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5q2r4AoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgloiDjwgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tbnrgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uu5nggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5u_FvAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgluLyugsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5sXssQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqbC9gkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5oeMpgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglujMtgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uXMrgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rfSpQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglujQpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5qWnpgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tvEowkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5r3TqwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rSKoQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uujwAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rfSpQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tLdlAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5s-aogsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5pGxrgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglua0uQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqinugoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglri7tAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglrTPqgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5qGd6AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgloyg8AsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5t2i4QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rufpAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqb7sQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglv7rrQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5p3ztwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5pSP7QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5oWkqwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglpTv9goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5svU7wsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglsaM7QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5qu89QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5svU7wkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5taOuwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqbCtgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5oHimQkM


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

chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-win10
chromium-rel-win7-gpu-intel

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8977233800328138256

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : c8e6cdfdcee0319fec69926e074d047f668c6f8b
  Date   : Tue Jun 06 14:16:55 2017
  Subject: Revert "[heap] Use partial free when shrinking instead of uncommitting"

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:heap:map_space:effective_size_avg/video.html?src_tulip2.vp9.webm
  Change       : 92.48% | 544768.0 -> 1048576.0

Revision                           Result              N
chromium@477370                    544768 +- 0.0       6      good
chromium@477436                    544768 +- 0.0       6      good
chromium@477445                    544768 +- 0.0       6      good
chromium@477447                    544768 +- 0.0       6      good
chromium@477448                    544768 +- 0.0       6      good
chromium@477448,v8@8a15026270      544768 +- 0.0       6      good
chromium@477448,v8@c8e6cdfdce      1048576 +- 0.0      6      bad       <--
chromium@477448,v8@5005faed5c      1048576 +- 0.0      6      bad
chromium@477449                    1048576 +- 0.0      6      bad
chromium@477453                    1048576 +- 0.0      6      bad
chromium@477469                    1048576 +- 0.0      6      bad
chromium@477502                    1048576 +- 0.0      6      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=video.html.src.tulip2.vp9.webm media.tough_video_cases_tbmv2

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8977233800328138256

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5816560574267392


| 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!