All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775298

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=ca2edff3a082a43231eed8cb0163757ed6831dd4798a32d5805bd0221a63ca66


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

chromium-rel-mac-retina

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965532696956673904

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

Suspected Commit
  Author : Dale Curtis
  Commit : 5341599c0b2b5a74f62a7734d592d7faae9983c8
  Date   : Sat Oct 14 01:01:26 2017
  Subject: Add support for discarding video frames post-decode.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:cc:effective_size_avg/video.html?src_tulip2.vp9.webm_seek
  Change       : 17.26% | 32698690.6667 -> 38342637.3333

Revision             Result                   N
chromium@508851      32698691 +- 4388140      6      good
chromium@508888      33313091 +- 4206601      6      good
chromium@508893      30691651 +- 5928220      6      good
chromium@508894      30677997 +- 3018097      6      good
chromium@508895      38943384 +- 3814342      6      bad       <--
chromium@508896      39434904 +- 802649       6      bad
chromium@508898      39434904 +- 4680207      6      bad
chromium@508907      39544131 +- 756745       6      bad
chromium@508925      38342637 +- 4412541      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 --story-filter=video.html.src.tulip2.vp9.webm.seek media.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965532696956673904


For feedback, file a bug with component Speed>Bisection