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Issue metadata

Status: Duplicate
Merged: issue 759458
Owner:
Closed: Aug 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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3.6%-29.5% regression in speedometer at 497393:497584

Project Member Reported by tebbi@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=759459

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=bd3b2f03cddfed7bd555c26535b1ac1d508bfd4f1251a112d43af8dbc6c1eb87


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

android-nexus7v2
android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12-mini-8gb
chromium-rel-win7-dual
linux-release
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 28 2017

Mergedinto: 759458
Status: Duplicate (was: Assigned)

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

Suspected Commit
  Author : Sahel Sharify
  Commit : f53825a1fb92e74b9a889b9501243e03de57094d
  Date   : Fri Aug 25 19:16:21 2017
  Subject: Wheel scroll latching and async wheel events flags enabled in testing config.

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Total:duration_avg/browse_social/browse_social_facebook_infinite_scroll
  Change       : 24.38% | 9064.64916667 -> 11274.4016667

Revision             Result                  N
chromium@497451      9064.65 +- 461.159      6      good
chromium@497478      9004.05 +- 375.717      6      good
chromium@497482      9076.03 +- 177.776      6      good
chromium@497483      11271.0 +- 207.768      6      bad       <--
chromium@497484      11321.7 +- 366.616      6      bad
chromium@497485      11197.1 +- 582.599      6      bad
chromium@497491      11433.3 +- 355.848      6      bad
chromium@497504      11252.3 +- 575.735      6      bad
chromium@497557      11274.4 +- 334.881      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=browse.social.facebook.infinite.scroll v8.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970031517611269920


For feedback, file a bug with component Speed>Bisection

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