All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784465

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=5e3aa12f7143dc3395c1be4721ebd01a21bff95cb71113e17becdd9c36bdb158


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

chromium-rel-win7-dual
chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963018742622449968

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

Suspected Commit
  Author : Alexandr Ilin
  Commit : e378a8f40efd70f0f138f16eb4a14a290261da86
  Date   : Fri Nov 10 07:54:20 2017
  Subject: Enable SpeculativePreconnect Field Trial Testing

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:skia:effective_size_avg/video.html?src_crowd1080.webm
  Change       : 1.11% | 56224.4444444 -> 56849.3333333

Revision             Result                  N
chromium@515497      56224.4 +- 7084.89      9       good
chromium@515500      56230.9 +- 6052.58      14      good
chromium@515501      57606.0 +- 19661.2      14      good
chromium@515502      56822.7 +- 878.836      9       bad       <--
chromium@515503      57002.2 +- 544.914      9       bad
chromium@515509      56825.3 +- 546.231      9       bad
chromium@515521      57764.0 +- 5752.98      9       bad
chromium@515544      56849.3 +- 289.22       9       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.crowd1080.webm media.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963018742622449968


For feedback, file a bug with component Speed>Bisection