All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=800100

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3e3c0debc3bfb3f269353fefdaa41374a2c8683daea00062b4a6a1f4c33ae584


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

android-nexus6
android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8957930543484946304

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

Suspected Commit
  Author : George Burgess IV
  Commit : 274d75742451914f74bbad40c405da7f902dd232
  Date   : Wed Jan 03 23:22:46 2018
  Subject: Turn on AFDO for Chromium on Android

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : thread_times.tough_scrolling_cases
  Metric       : thread_raster_cpu_time_per_frame/text_50000_pixels_per_second
  Change       : 9.79% | 5.88167362869 -> 6.45773930888

Revision             Result                   N
chromium@526694      5.88167 +- 0.18662       6      good
chromium@526841      6.00088 +- 0.173213      6      good
chromium@526851      5.97948 +- 0.339942      9      good
chromium@526856      6.07634 +- 0.602809      9      good
chromium@526857      5.94137 +- 0.191154      6      good
chromium@526858      6.48144 +- 0.272611      6      bad       <--
chromium@526860      6.50414 +- 0.519375      9      bad
chromium@526878      6.53769 +- 0.531377      6      bad
chromium@526914      6.46415 +- 0.376205      6      bad
chromium@526987      6.45774 +- 0.461827      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=text.50000.pixels.per.second 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/8957930543484946304


For feedback, file a bug with component Speed>Bisection