All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755545

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=69dbfc8211871dbd532f6dfe98c9ee9f3e2e0d0eb3cb8584fd2e687383cac7f9


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

chromium-rel-win7-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971182620349510672

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971182545515539312

=== 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/tough_canvas_cases_canvas2d_balls_common_bouncing_balls.html?ball_image_with_shadow_back_image
  Change       : 56.91% | 132.610630275 -> 208.073967391

Revision             Result                  N
chromium@493707      132.611 +- 3.59992      6      good
chromium@493758      130.381 +- 2.91578      6      good
chromium@493760      129.613 +- 9.59477      6      good
chromium@493761      129.208 +- 11.5362      6      good
chromium@493762      205.278 +- 2.05581      6      bad       <--
chromium@493765      206.874 +- 2.686        6      bad
chromium@493771      208.278 +- 1.71051      6      bad
chromium@493784      206.657 +- 8.25471      6      bad
chromium@493809      206.139 +- 3.68261      6      bad
chromium@493910      208.074 +- 5.7667       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=tough.canvas.cases.canvas2d.balls.common.bouncing.balls.html.ball.image.with.shadow.back.image 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/8971182620349510672


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/tough_canvas_cases_canvas2d_balls_common_bouncing_balls.html?ball_image_with_shadow_back_image
  Change       : 63.09% | 120.118243902 -> 195.903586667

Revision             Result                   N
chromium@493707      120.118 +- 1.29195       6      good
chromium@493758      120.073 +- 0.598809      6      good
chromium@493760      120.474 +- 2.02347       6      good
chromium@493761      118.227 +- 7.88163       6      good
chromium@493762      196.941 +- 6.05415       6      bad       <--
chromium@493765      196.042 +- 3.2297        6      bad
chromium@493771      195.199 +- 2.11752       6      bad
chromium@493784      196.466 +- 1.96645       6      bad
chromium@493809      196.918 +- 2.3442        6      bad
chromium@493910      195.904 +- 1.16293       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=tough.canvas.cases.canvas2d.balls.common.bouncing.balls.html.ball.image.with.shadow.back.image 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/8971182545515539312


For feedback, file a bug with component Speed>Bisection