All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=780181

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=618b3bd8191b3661e43e69dbd8644821f40f94e3baf65c56650f4de476e7e8ca


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

chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964186671064854608

=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: win_x64_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/tough_canvas_cases_canvas_toBlob.html

Revision             Result                  N
chromium@510719      21.227 +- 1.42984       21      good
chromium@510729      21.4039 +- 1.76919      21      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=tough.canvas.cases.canvas.toBlob.html smoothness.tough_canvas_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964186671064854608


For feedback, file a bug with component Speed>Bisection

Bisect can't repro and this has gone down below original levels.