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Issue 784355 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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12.9%-77.6% regression in system_health.common_desktop at 515415:515545

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=784355

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=cfda13fa75dd51f5bd941595b553236ab1e24d86e84044624d06916952d16972


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

chromium-rel-mac12
chromium-rel-win7-gpu-intel
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
Project Member

Comment 4 by 42576172...@developer.gserviceaccount.com, Nov 13 2017 

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/16fed151f80000
Project Member

Comment 6 by 42576172...@developer.gserviceaccount.com, Nov 13 2017 


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

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : timeToFirstContentfulPaint_avg/browse_social/browse_social_twitter_infinite_scroll

Revision             Result                  N
chromium@515431      3279.21 +- 6508.72      21      good
chromium@515524      3712.11 +- 7466.67      21      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.twitter.infinite.scroll system_health.common_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963035971074513664


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

Comment 7 by 42576172...@developer.gserviceaccount.com, Nov 14 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: winx64intel_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : timeToFirstPaint_avg/multitab_misc/multitab_misc_typical24
  Change       : 61.34% | 1311.7350787 -> 2038.72313889

Revision             Result                  N
chromium@515490      1311.74 +- 381.588      9      good
chromium@515497      1349.5 +- 606.143       9      good
chromium@515501      1286.83 +- 525.842      9      good
chromium@515502      1642.71 +- 762.673      9      bad       <--
chromium@515503      1623.27 +- 578.504      9      bad
chromium@515504      1692.15 +- 729.772      9      bad
chromium@515517      1668.63 +- 610.626      6      bad
chromium@515544      2038.72 +- 2062.49      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=multitab.misc.typical24 system_health.common_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963026862084345760


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

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