All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=774549

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=10abab89c24a909d2bf93cee40e1581a12edc350a3650617758fddd5b1613f27


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

chromium-rel-win7-gpu-ati

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965831239835898896

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : c98596763f36fd5fcc0c984be67b59f3775b35ac
  Date   : Wed Oct 11 23:19:16 2017
  Subject: gpu: Prioritize contexts with client waits.

Bisect Details
  Configuration: winx64ati_perf_bisect
  Benchmark    : smoothness.tough_animation_cases
  Metric       : frame_times/overlay_background_color_css_transitions.html
  Change       : 10.93% | 111.920624015 -> 124.15149519

Revision             Result                  N
chromium@508157      111.921 +- 5.45566      6      good
chromium@508164      108.938 +- 5.27664      6      good
chromium@508165      110.236 +- 1.60061      6      good
chromium@508166      123.98 +- 3.69653       6      bad       <--
chromium@508167      122.366 +- 3.14179      6      bad
chromium@508170      122.702 +- 7.482        6      bad
chromium@508182      123.305 +- 2.4464       6      bad
chromium@508206      123.877 +- 3.08787      6      bad
chromium@508254      124.151 +- 3.97409      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=overlay.background.color.css.transitions.html smoothness.tough_animation_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965831239835898896


For feedback, file a bug with component Speed>Bisection