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Issue metadata

Status: Duplicate
Merged: issue 758281
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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46.7% regression in smoothness.top_25_smooth at 494991:495262

Project Member Reported by kraynov@chromium.org, Aug 28 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 28 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=759711

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=74f76dc2dc0d74830a29b43518098899447f9ae4ec565712bf58e5f447a8012f


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

chromium-rel-mac-retina
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 29 2017

Mergedinto: 758281
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : sahel
  Commit : 955c32907a2c9921065fa628e0b8b5b28a7afe6c
  Date   : Thu Aug 17 14:56:44 2017
  Subject: Change tests that fail with wheel scroll latching and async wheel on.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : first_gesture_scroll_update_latency/https___www.google.com_search?q_cats_tbm_isch
  Change       : 48.15% | 2.85716666667 -> 4.233

Revision             Result                   N
chromium@494990      2.85717 +- 0.344988      6      good
chromium@495126      2.55867 +- 1.05029       6      good
chromium@495160      2.915 +- 0.318402        6      good
chromium@495169      2.91033 +- 0.284902      6      good
chromium@495171      2.82133 +- 0.281036      6      good
chromium@495172      2.76283 +- 0.178261      6      good
chromium@495173      4.36083 +- 0.26349       6      bad       <--
chromium@495177      4.321 +- 0.31357         6      bad
chromium@495194      4.3305 +- 0.10126        6      bad
chromium@495262      4.233 +- 0.367304        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 --story-filter=https...www.google.com.search.q.cats.tbm.isch 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/8969999007510157040


For feedback, file a bug with component Speed>Bisection

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