All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784417

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d4b7592b73729d28715ce89d0173cedc55354da4ddf1f946326f45e4084c963c


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

chromium-rel-win7-dual
chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963025042999882384

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

Suspected Commit
  Author : Justin Novosad
  Commit : 5b07996e178c5f4e153e771d48ab839867fa7440
  Date   : Wed Nov 08 23:26:00 2017
  Subject: Reland: Refactor of Canvas2DLayerBridge resource model

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : smoothness.gpu_rasterization.tough_path_rendering_cases
  Metric       : frame_times/GUIMark Vector Chart Test
  Change       : 14.02% | 17.4664681236 -> 19.9152507826

Revision             Result                   N
chromium@514931      17.4665 +- 0.382726      6      good
chromium@514979      17.5164 +- 0.393101      6      good
chromium@514991      17.4704 +- 0.438214      6      good
chromium@514997      17.5673 +- 0.498997      6      good
chromium@515000      17.6368 +- 0.468058      6      good
chromium@515001      19.822 +- 0.282367       6      bad       <--
chromium@515002      19.8293 +- 0.227875      6      bad
chromium@515003      19.8401 +- 0.233916      6      bad
chromium@515026      19.9153 +- 0.411453      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=GUIMark.Vector.Chart.Test smoothness.gpu_rasterization.tough_path_rendering_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963025042999882384


For feedback, file a bug with component Speed>Bisection