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Issue 715772 link

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Issue metadata

Status: Duplicate
Merged: issue 711044
Owner: ----
Closed: Apr 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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63% improvement in system_health.common_desktop at 463520:463909

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=715772

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg_LnMlAoM


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

chromium-rel-mac-retina
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Apr 27 2017

Mergedinto: 711044
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : delphick
  Commit : d8ade60fbe0ea954ecd5f186c36e6d0ac045c28c
  Date   : Tue Apr 11 09:56:28 2017
  Subject: No longer clamp setTimeout(..., 0) to 1ms.

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : timeToFirstMeaningfulPaint_avg/browse_news/browse_news_flipboard
  Change       : 61.99% | 1837.33183333 -> 698.293333333

Revision             Result                  N
chromium@463519      1837.33 +- 196.068      6      good
chromium@463568      1834.45 +- 182.302      6      good
chromium@463581      1814.71 +- 163.603      6      good
chromium@463587      1823.66 +- 181.814      6      good
chromium@463590      1839.9 +- 264.011       6      good
chromium@463591      693.463 +- 19.3158      6      bad       <--
chromium@463592      688.002 +- 24.2158      6      bad
chromium@463593      690.345 +- 13.5337      6      bad
chromium@463617      688.332 +- 23.8218      6      bad
chromium@463714      687.402 +- 15.4173      6      bad
chromium@463909      698.293 +- 66.6825      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=browse.news.flipboard system_health.common_desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8981215631966137936

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4947913496592384


| 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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