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Issue 741680 link

Starred by 1 user
Status: Duplicate
Merged: issue 741730
Owner: ----
Closed: Jul 2017
Cc:
█ pmeenan@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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1.5%-120% regression in loading.desktop at 484688:484870

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

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

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=741680

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=90cbcd1c0e6bbab026ad984db9c654dc6b71fe338155c8fb7dcb2e38aa12e7ac


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

chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
win-high-dpi
Project Member

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

Mergedinto: 741730
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : rch
  Commit : d6e1cab1edf5f432d2ce09ff8ee34fe14abaff5a
  Date   : Fri Jul 07 03:59:30 2017
  Subject: Enable QUIC v39 by default.

Bisect Details
  Configuration: winx64_high_dpi_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstContentfulPaint_avg/pcv1-warm/MLB
  Change       : 54.33% | 705.627785716 -> 1178.96171429

Revision             Result                  N
chromium@484780      705.628 +- 1358.34      14      good
chromium@484818      878.097 +- 1752.78      21      good
chromium@484823      832.63 +- 920.003       9       good
chromium@484825      618.728 +- 718.222      6       good
chromium@484826      1279.82 +- 514.81       9       bad       <--
chromium@484828      1322.54 +- 211.271      9       bad
chromium@484837      1287.38 +- 650.262      9       bad
chromium@484855      1178.96 +- 839.469      14      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=MLB loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974260920908147312


For feedback, file a bug with component Speed>Bisection
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