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Issue metadata

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



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41.2% improvement in page_cycler_v2.intl_es_fr_pt-BR at 470449:470509

Project Member Reported by yhirano@chromium.org, May 15 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=722282

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg6srhrAoM


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

android-nexus5
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, May 15 2017

Mergedinto: 721238
Status: Duplicate (was: Assigned)

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

Suspected Commit
  Author : yhirano
  Commit : 91088a195969f5af61f404c9f02edc622cbe373a
  Date   : Wed May 10 05:49:31 2017
  Subject: Add Field Trial Testing Configuration for MojoLoading

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : page_cycler_v2.intl_es_fr_pt-BR
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/http___elmundo.es_
  Change       : 42.06% | 1886.989375 -> 1157.061

Revision             Result                  N
chromium@470448      1886.99 +- 958.344      8       good
chromium@470479      1895.88 +- 1198.64      8       good
chromium@470487      1821.89 +- 1363.31      11      good
chromium@470489      2080.08 +- 121.565      4       good
chromium@470490      1112.6 +- 259.434       8       bad       <--
chromium@470491      1231.18 +- 593.998      14      bad
chromium@470494      1177.2 +- 191.441       11      bad
chromium@470509      1157.06 +- 138.672      9       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http...elmundo.es. page_cycler_v2.intl_es_fr_pt-BR

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979537251655668544

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5308348678799360


| 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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