All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755548

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=05856f3ce60774c9356bc86558820df6494dc47c5c261ecfb02b649fb3066941


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

chromium-rel-win7-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971182466426831040

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971182454464077648

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

Suspected Commit
  Author : Florin Malita
  Commit : 275968c6b76579864cf3af64a707bce881db521b
  Date   : Fri Aug 11 16:06:43 2017
  Subject: Use Skia's raster pipeline for rotated/skewed shaders

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/http___www.smashcat.org_av_canvas_test_
  Change       : 82.86% | 22.0662022284 -> 40.3499860392

Revision             Result                   N
chromium@493707      22.0662 +- 0.609937      6      good
chromium@493758      22.4068 +- 1.54645       6      good
chromium@493760      22.5334 +- 0.986638      6      good
chromium@493761      22.0755 +- 0.867583      6      good
chromium@493762      40.0749 +- 0.605559      6      bad       <--
chromium@493765      40.8242 +- 3.1212        6      bad
chromium@493771      40.2914 +- 1.08948       6      bad
chromium@493784      40.3401 +- 0.337096      6      bad
chromium@493809      40.9075 +- 0.835031      6      bad
chromium@493910      40.35 +- 0.980277        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=http...www.smashcat.org.av.canvas.test. 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/8971182454464077648


For feedback, file a bug with component Speed>Bisection

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

Suspected Commit
  Author : Florin Malita
  Commit : 275968c6b76579864cf3af64a707bce881db521b
  Date   : Fri Aug 11 16:06:43 2017
  Subject: Use Skia's raster pipeline for rotated/skewed shaders

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/http___www.smashcat.org_av_canvas_test_
  Change       : 116.64% | 16.8388794078 -> 36.479231873

Revision             Result                    N
chromium@493707      16.8389 +- 0.0509493      6      good
chromium@493758      16.9194 +- 0.24628        6      good
chromium@493760      16.8331 +- 0.240084       6      good
chromium@493761      16.8609 +- 0.114771       6      good
chromium@493762      36.2628 +- 0.318724       6      bad       <--
chromium@493765      36.3082 +- 0.106574       6      bad
chromium@493771      37.1444 +- 4.45935        6      bad
chromium@493784      37.6138 +- 4.48562        6      bad
chromium@493809      36.7343 +- 0.501088       6      bad
chromium@493910      36.4792 +- 0.483418       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=http...www.smashcat.org.av.canvas.test. 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/8971182466426831040


For feedback, file a bug with component Speed>Bisection