All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775377

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d16e4283e906dc8b3b2b77a592b10deed9026d37bcd9ff802c5a6135687fb8d9


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

chromium-rel-mac-retina

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965512834952321504

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

Suspected Commit
  Author : sunxd
  Commit : 48493dc45de06867eec97e7944f56d511e3c4578
  Date   : Thu Oct 12 20:25:14 2017
  Subject: cc: make solid color picture layer tiling respect device scale factor

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : performance_browser_tests
  Metric       : CastV2Performance_gpu_24fps/capture_duration
  Change       : 6.10% | 9.865875 -> 10.4679603333

Revision             Result                    N
chromium@508375      9.86588 +- 0.1633         6      good
chromium@508441      10.0712 +- 0.286049       9      good
chromium@508442      10.4832 +- 0.0888584      6      bad       <--
chromium@508443      10.4246 +- 0.594286       9      bad
chromium@508444      10.5745 +- 0.292549       6      bad
chromium@508446      10.3497 +- 0.999541       9      bad
chromium@508450      10.4564 +- 0.232424       6      bad
chromium@508458      10.4985 +- 0.472111       6      bad
chromium@508474      10.49 +- 0.123841         6      bad
chromium@508507      10.468 +- 0.226127        6      bad

To Run This Test
  ./src/out/Release/performance_browser_tests --test-launcher-print-test-stdio=always --enable-gpu

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965512834952321504


For feedback, file a bug with component Speed>Bisection