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Issue 774086 link

Starred by 1 user
Status: Duplicate
Merged: issue 774072
Owner: ----
Closed: Oct 2017
Cc:
primiano@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.8%-138.8% regression in loading.desktop at 507646:507820

Project Member Reported by primiano@chromium.org, Oct 12 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Oct 12 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=774086

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0f45246d2137be3fa728d8ccb01159587e17c1cdb9cc2b7184d3b75b20272f7d


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12-mini-8gb
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual
win-high-dpi
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Oct 12 2017

Mergedinto: 774072
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Ehsan Chiniforooshan
  Commit : c77b44ebb53886e039c8471548c2050cceceda59
  Date   : Tue Oct 10 18:12:10 2017
  Subject: tracing: TracingController -> Coordinator

Bisect Details
  Configuration: winx64nvidia_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/cold/Taobao
  Change       : 163.35% | 24.5498333333 -> 64.6523333333

Revision             Result                  N
chromium@507653      24.5498 +- 13.0607      6      good
chromium@507688      27.1228 +- 34.5524      6      good
chromium@507705      29.0968 +- 44.8972      9      good
chromium@507714      21.9592 +- 6.90014      9      good
chromium@507716      25.6534 +- 36.3677      9      good
chromium@507717      59.6767 +- 17.7237      9      bad       <--
chromium@507718      60.3926 +- 17.8517      9      bad
chromium@507722      64.6523 +- 18.8718      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=Taobao loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965932894024531856


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

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