All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=774087

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6228a7dcb195efcd3acc56411fab8749c8fd7beb1879f76e001d8cd3ce722523


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

android-nexus5
android-nexus7v2
android-webview-nexus5X
android-webview-nexus6
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-mac12-mini-8gb
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-nvidia
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965932873655465040

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

Suspected Commit
  Author : Christopher Cameron
  Commit : 7ad584b2ad8cc768d46051d9933a3bb5a4ce06d4
  Date   : Mon Oct 09 21:27:21 2017
  Subject: canvas: Fix default values for color space

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : blink_perf.canvas
  Metric       : draw-dynamic-canvas-2d-to-hw-accelerated-canvas-2d/draw-dynamic-canvas-2d-to-hw-accelerated-canvas-2d
  Change       : 8.41% | 25193.3864986 -> 23075.7656685

Revision             Result                  N
chromium@507424      25193.4 +- 2575.46      9      good
chromium@507488      25729.0 +- 2353.06      6      good
chromium@507490      25255.9 +- 1105.42      6      good
chromium@507491      25104.5 +- 1049.35      6      good
chromium@507492      22768.4 +- 1356.73      6      bad       <--
chromium@507496      23065.2 +- 509.871      6      bad
chromium@507504      23270.4 +- 535.452      6      bad
chromium@507520      23038.7 +- 941.908      6      bad
chromium@507551      23075.8 +- 1029.2       6      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --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/8965932873655465040


For feedback, file a bug with component Speed>Bisection