All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=781549

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e69ea82589238abdea77f7a8a1806b7c71606da2dd83ce211b528e1f0d6f4c0b


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

chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963833512209582384

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

Suspected Commit
  Author : Xu Xing
  Commit : 487b6616f10eff5f5d0d8805668bb80870342e0b
  Date   : Thu Nov 02 00:16:14 2017
  Subject: Cache SkImage in resource_sk_image_

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:malloc:effective_size_avg/video.html?src_tulip2.vp9.webm
  Change       : 0.72% | 17519604.2857 -> 17646253.5

Revision             Result                   N
chromium@513302      17519604 +- 1379983      14      good
chromium@513327      17463901 +- 1275032      14      good
chromium@513331      17423036 +- 864770       9       good
chromium@513333      17431925 +- 843237       9       good
chromium@513334      17516146 +- 805029       14      bad       <--
chromium@513340      17531266 +- 933619       14      bad
chromium@513352      17510563 +- 1028474      21      bad
chromium@513404      17646254 +- 1408250      14      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 media.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963833512209582384


For feedback, file a bug with component Speed>Bisection