All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=768537

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=8870f011b0712dad176e30cc1f6e39f97dad562d5a84e1099301592a6e38100c


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

android-nexus5X
android-nexus7v2
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-intel
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967446605074767216

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

Suspected Commit
  Author : Eric Seckler
  Commit : 1b697fc546af51e355c458bc4e10f821a1c8d551
  Date   : Sun Sep 24 07:41:53 2017
  Subject: [viz] Ensure that ClientLTFS acknowledges racy BeginFrames.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : mean_input_event_latency/http___techcrunch.com
  Change       : 106.82% | 16.0521666667 -> 33.199

Revision             Result                   N
chromium@503948      16.0522 +- 1.08354       6      good
chromium@503950      15.7608 +- 0.332657      6      good
chromium@503951      16.0402 +- 0.706229      6      good
chromium@503952      33.199 +- 1.88907        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=http...techcrunch.com smoothness.top_25_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967446605074767216


For feedback, file a bug with component Speed>Bisection