Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8976969264839867824

=== 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: win_x64_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/video.html?src_tulip2.vp9.webm
  Change       : 10.79% | 5693440.0 -> 6307840.0

Revision                           Result              N
chromium@477031                    5693440 +- 0.0      6      good
chromium@477313                    5693440 +- 0.0      6      good
chromium@477384                    5693440 +- 0.0      6      good
chromium@477419                    5693440 +- 0.0      6      good
chromium@477437                    5693440 +- 0.0      6      good
chromium@477446                    5693440 +- 0.0      6      good
chromium@477448                    5693440 +- 0.0      6      good
chromium@477448,v8@8a15026270      5693440 +- 0.0      6      good
chromium@477448,v8@c8e6cdfdce      6307840 +- 0.0      6      bad       <--
chromium@477448,v8@5005faed5c      6307840 +- 0.0      6      bad
chromium@477449                    6307840 +- 0.0      6      bad
chromium@477450                    6307840 +- 0.0      6      bad
chromium@477454                    6307840 +- 0.0      6      bad
chromium@477595                    6307840 +- 0.0      6      bad
chromium@478159                    6307840 +- 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/8976969264839867824

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6642427084931072


| 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!