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Issue metadata

Status: Duplicate
Merged: issue 737396
Owner: ----
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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26.8% regression in loading.desktop at 482331:482435

Project Member Reported by tdres...@chromium.org, Jun 28 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=737562

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg7qD-pQkM


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

chromium-rel-win10
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jun 28 2017

Mergedinto: 737396
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Marc Treib
  Commit : 6fb10fe065b1cfe4c4aa691c31c03e7387a72d40
  Date   : Mon Jun 26 18:39:55 2017
  Subject: Fieldtrial testing config for CaptureThumbnailOnLoadFinished

Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/pcv1-cold/Free.fr
  Change       : 32.51% | 52.6053333333 -> 70.5591666667

Revision             Result                  N
chromium@482330      52.6053 +- 7.87748      9      good
chromium@482334      55.3282 +- 5.31257      6      good
chromium@482335      54.713 +- 10.0623       6      good
chromium@482336      70.1017 +- 10.7498      6      bad       <--
chromium@482337      70.6528 +- 12.4288      6      bad
chromium@482344      72.3407 +- 13.9431      6      bad
chromium@482357      67.0352 +- 19.5799      6      bad
chromium@482383      64.8247 +- 28.5722      9      bad
chromium@482435      70.5592 +- 16.7894      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=Free.fr loading.desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8975538700339395408

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4504547302572032


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

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