All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=779173

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9a0fcb48accb6eaa13d316200977c4c79601a785c8d777ab64683486b719882b


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac12

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964555708444771728

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

Suspected Commit
  Author : Alexey Kozyatinskiy
  Commit : b2e85a2f81015193134de039cc5f4dd7c59ecd07
  Date   : Wed Oct 25 06:14:06 2017
  Subject: [inspector] removed unused injected-script methods

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/video.html?src_tulip2.vp9.webm_background
  Change       : 0.02% | 2714968.0 -> 2714425.33333

Revision                           Result                  N
chromium@511391                    2714968 +- 333.131      6      good
chromium@511405                    2715475 +- 157.039      6      good
chromium@511412                    2715408 +- 192.997      6      good
chromium@511415                    2715489 +- 228.922      6      good
chromium@511415,v8@343bf6f3ff      2715521 +- 489.691      6      good
chromium@511415,v8@b2e85a2f81      2714289 +- 298.994      6      bad       <--
chromium@511416                    2714083 +- 157.039      6      bad
chromium@511417                    2714357 +- 157.039      6      bad
chromium@511418                    2714425 +- 228.922      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.background media.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964555708444771728


For feedback, file a bug with component Speed>Bisection