All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=776487

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=c1fba108e4c0905fd22d1a58119dd8d2c6e3e6648b416fe7539c4d2f1f7703da


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965280094333061408

=== 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: android_nexus6_perf_bisect
  Benchmark    : thread_times.simple_mobile_sites
  Metric       : thread_GPU_cpu_time_per_frame/http___www.nyc.gov

Revision             Result                   N
chromium@508306      2.57882 +- 0.20662       6      good
chromium@508397      2.67963 +- 0.165827      6      good
chromium@508420      2.7422 +- 0.0674429      6      good
chromium@508431      2.63421 +- 0.092271      6      good
chromium@508437      2.7011 +- 0.133968       6      good
chromium@508440      2.69329 +- 0.168633      6      good
chromium@508441      2.67666 +- 0.2064        6      good
chromium@508442      3.39667 +- 0.179972      6      bad       <--
chromium@508487      3.3979 +- 0.238502       6      bad
chromium@508668      3.3513 +- 0.20839        6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http...www.nyc.gov thread_times.simple_mobile_sites

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965280094333061408


For feedback, file a bug with component Speed>Bisection