All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=766612

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0801733b5eb045ec92cd0ce68c0780318aac61718d6d147bfa39faad39db6850


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

win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968029944005958736

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

Suspected Commit
  Author : Kenneth Russell
  Commit : cdc786f5d2a2b538f4914ba0afbaee15634206b9
  Date   : Sat Sep 16 21:07:21 2017
  Subject: Use 8x MSAA rather than 4x MSAA when available.

Bisect Details
  Configuration: winx64_high_dpi_perf_bisect
  Benchmark    : blink_perf.canvas
  Metric       : draw-dynamic-webgl-to-hw-accelerated-canvas-2d/draw-dynamic-webgl-to-hw-accelerated-canvas-2d
  Change       : 37.75% | 2123.31177576 -> 2924.91835844

Revision             Result                  N
chromium@502503      2123.31 +- 267.582      6      good
chromium@502508      1964.44 +- 960.92       6      good
chromium@502511      2035.43 +- 958.889      6      good
chromium@502512      2109.85 +- 132.582      6      good
chromium@502513      2924.92 +- 554.1        6      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 blink_perf.canvas

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968029944005958736


For feedback, file a bug with component Speed>Bisection