All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775235

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=73f37038ca5aa9f5c69e3f0af6d4d75a1639964e9719054ae5677140f2265821


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965540776165164672

=== 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_nexus5_perf_bisect
  Benchmark    : thread_times.key_silk_cases
  Metric       : thread_total_fast_path_cpu_time_per_frame/http___jsfiddle.net_bNp2h_3_show_
  Change       : 7.55% | 13.7071217844 -> 14.7424017094

Revision             Result                   N
chromium@508374      13.7071 +- 0.622983      6      good
chromium@508432      13.7272 +- 0.819269      6      good
chromium@508440      13.5127 +- 0.938943      6      good
chromium@508441      13.7775 +- 0.73418       6      good
chromium@508442      14.677 +- 0.52417        6      bad       <--
chromium@508444      14.678 +- 0.245876       6      bad
chromium@508447      14.7593 +- 0.174305      6      bad
chromium@508461      14.6883 +- 0.62948       6      bad
chromium@508489      14.7424 +- 0.855162      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...jsfiddle.net.bNp2h.3.show. thread_times.key_silk_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965540776165164672


For feedback, file a bug with component Speed>Bisection