All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=754252

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=889f864b9ef112c634c7c0dc9a9c0e180efc3ae9aea26c0776461d22d2b012c4


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

android-nexus7v2
chromium-rel-mac11
chromium-rel-mac11-air

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971643932321504016

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

Suspected Commit
  Author : Christopher Cameron
  Commit : 1894d423068be735560e0171922c833c4091b5d1
  Date   : Wed Jun 28 06:31:03 2017
  Subject: color: Enable color correct rendering by default

Bisect Details
  Configuration: mac_air_perf_bisect
  Benchmark    : thread_times.tough_scrolling_cases
  Metric       : thread_raster_cpu_time_per_frame/thread_raster_cpu_time_per_frame
  Change       : 4.26% | 1.35617333854 -> 1.41393561326

Revision             Result                     N
chromium@482843      1.35617 +- 0.0268024       6      good
chromium@482882      1.33357 +- 0.00851594      6      good
chromium@482901      1.34614 +- 0.0539191       6      good
chromium@482903      1.35372 +- 0.0230476       6      good
chromium@482904      1.40662 +- 0.0246034       6      bad       <--
chromium@482906      1.3918 +- 0.0323934        9      bad
chromium@482911      1.39931 +- 0.0413448       6      bad
chromium@482920      1.41394 +- 0.0347431       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests thread_times.tough_scrolling_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971643932321504016


For feedback, file a bug with component Speed>Bisection

This change landed ~1.5 months ago and is already in beta.

Also, many of these graphs have completely resolved.