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Issue 715773 link

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Issue metadata

Status: WontFix
Owner:
Closed: May 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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29.7% improvement in startup.cold.blank_page at 463723:463909

Project Member Reported by samans@chromium.org, Apr 26 2017

Issue description

See the link to graphs below.
 

Comment 1 by samans@chromium.org, Apr 26 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=715773

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgopORuwsM


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

chromium-rel-mac-retina
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Apr 26 2017

Owner: samans@chromium.org

=== Auto-CCing suspected CL author samans@chromium.org ===

Hi samans@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : samans
  Commit : 2040988b1345e6ce738bd03ab7ccd5f4b73a956b
  Date   : Tue Apr 11 23:58:35 2017
  Subject: Use MojoCompositorFrameSink in RendererCompositorFrameSink

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : startup.cold.blank_page
  Metric       : messageloop_start_time/messageloop_start_time
  Change       : 38.25% | 437.5 -> 270.166666667

Revision             Result                  N
chromium@463722      437.5 +- 91.1455        6      good
chromium@463816      425.667 +- 30.9408      6      good
chromium@463840      434.167 +- 57.296       6      good
chromium@463843      445.833 +- 48.258       6      good
chromium@463844      440.167 +- 45.5942      6      good
chromium@463845      271.0 +- 53.1789        6      bad       <--
chromium@463846      275.5 +- 66.4041        6      bad
chromium@463852      273.5 +- 46.5994        6      bad
chromium@463863      270.833 +- 55.2343      6      bad
chromium@463909      270.167 +- 52.9607      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 startup.cold.blank_page

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8981215593647210256

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5236630593470464


| 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!

Comment 4 by samans@chromium.org, May 29 2017

Status: WontFix (was: Untriaged)

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