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Issue 764724 link

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Issue metadata

Status: Duplicate
Merged: issue 763897
Owner: ----
Closed: Sep 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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14.8% regression in smoothness.top_25_smooth at 500483:500532

Project Member Reported by mustaq@chromium.org, Sep 13 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Sep 13 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=764724

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=07ac6f78af7d5a119defcbf02a1e622d3e23f96e554e10b9c9fb396414a6284e


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

chromium-rel-win7-x64-dual
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Sep 13 2017

Mergedinto: 763897
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Dave Tapuska
  Commit : fbf2168e533bf593c0dfc5300f6a86f13fda3845
  Date   : Fri Sep 08 03:15:11 2017
  Subject: Reland "Enable mojo input messages on all platforms other than android."

Bisect Details
  Configuration: win_x64_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : percentage_smooth/ESPN
  Change       : 15.01% | 50.2199552595 -> 42.6836327737

Revision             Result                  N
chromium@500482      50.22 +- 8.89018        6      good
chromium@500495      48.1135 +- 7.49885      6      good
chromium@500496      40.3918 +- 7.24234      6      bad       <--
chromium@500497      40.4999 +- 11.7207      9      bad
chromium@500498      40.3262 +- 3.70577      6      bad
chromium@500501      38.11 +- 6.97989        6      bad
chromium@500507      39.1002 +- 5.29181      6      bad
chromium@500532      42.6836 +- 5.25975      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=ESPN 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/8968558589920037424


For feedback, file a bug with component Speed>Bisection

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