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Issue metadata

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



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5.4%-13.6% regression in loading.desktop at 477446:477613

Project Member Reported by alexclarke@chromium.org, Jun 12 2017

Issue description

See the link to graphs below.
 
Project Member

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

Mergedinto: 730475
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : mek
  Commit : c8e2b27f71c6792fa1072fa98a22c111ad229090
  Date   : Tue Jun 06 23:18:28 2017
  Subject: Switch to mojo localstorage backend by default.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/Leboncoin
  Change       : 16.70% | 484.748777776 -> 565.686333333

Revision             Result                  N
chromium@477445      484.749 +- 51.1923      9       good
chromium@477452      490.469 +- 92.6375      13      good
chromium@477456      490.404 +- 85.8346      9       good
chromium@477457      479.539 +- 25.8896      6       good
chromium@477458      547.029 +- 93.3722      9       bad       <--
chromium@477459      538.175 +- 31.2888      9       bad
chromium@477473      534.983 +- 28.1211      6       bad
chromium@477501      538.244 +- 23.6726      6       bad
chromium@477556      565.686 +- 112.501      6       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=Leboncoin loading.desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8977001920520155248

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4928176788078592


| 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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