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Issue 784388 link

Starred by 1 user
Status: Duplicate
Merged: issue 784206
Owner: ----
Closed: Nov 2017
Cc:
tdresser@google.com
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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8.5% regression in smoothness.tough_canvas_cases at 515838:515841

Project Member Reported by tdres...@chromium.org, Nov 13 2017 
See the link to graphs below.
Project Member

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

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784388

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6389ef664c1e2c751c37bd31ba583da73a7d9bddf6d9376dfe7949a144f63079


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

chromium-rel-win7-gpu-nvidia
Project Member

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


=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/http___ie.microsoft.com_testdrive_Performance_SpeedReading_Default.html

Revision             Result                  N
chromium@515837      20.4295 +- 5.49856      21      good
chromium@515841      20.1602 +- 3.74958      21      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...ie.microsoft.com.testdrive.Performance.SpeedReading.Default.html smoothness.tough_canvas_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963033003551559728


For feedback, file a bug with component Speed>Bisection
Project Member

Comment 5 by 42576172...@developer.gserviceaccount.com, Nov 13 2017

Mergedinto: 784206
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Alexandr Ilin
  Commit : e378a8f40efd70f0f138f16eb4a14a290261da86
  Date   : Fri Nov 10 07:54:20 2017
  Subject: Enable SpeculativePreconnect Field Trial Testing

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/http___ie.microsoft.com_testdrive_Performance_SpeedReading_Default.html
  Change       : 8.95% | 18.8653990465 -> 20.5536850238

Revision             Result                   N
chromium@515497      18.8654 +- 0.466025      6      good
chromium@515500      18.7714 +- 0.443763      9      good
chromium@515501      19.0385 +- 2.4675        9      good
chromium@515502      19.8548 +- 1.41758       9      bad       <--
chromium@515503      20.7683 +- 1.59997       6      bad
chromium@515508      20.681 +- 2.48352        6      bad
chromium@515519      20.444 +- 3.97137        6      bad
chromium@515540      20.0185 +- 3.20936       9      bad
chromium@515583      20.2458 +- 1.76238       6      bad
chromium@515669      20.8783 +- 2.91983       6      bad
chromium@515841      20.5537 +- 2.20979       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...ie.microsoft.com.testdrive.Performance.SpeedReading.Default.html smoothness.tough_canvas_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963023245271028112


For feedback, file a bug with component Speed>Bisection
►

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