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Issue 731146 link

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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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18.7% regression in loading.desktop at 477449:477562

Project Member Reported by primiano@chromium.org, Jun 8 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=731146

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5seJ9AoM


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

chromium-rel-mac11
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_10_11_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/TheOnion
  Change       : 17.02% | 769.072333331 -> 899.937666665

Revision             Result                  N
chromium@477448      769.072 +- 186.601      9      good
chromium@477456      739.693 +- 210.622      6      good
chromium@477457      785.725 +- 145.399      6      good
chromium@477458      913.006 +- 102.842      6      bad       <--
chromium@477460      928.229 +- 181.842      6      bad
chromium@477463      894.784 +- 170.141      9      bad
chromium@477477      906.048 +- 82.3509      6      bad
chromium@477505      913.068 +- 128.835      6      bad
chromium@477562      899.938 +- 108.05       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=TheOnion loading.desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8977343155577090880

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5300874353573888


| 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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