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Issue 722279 link

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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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42.9% improvement in v8.runtimestats.browsing_mobile_classic at 470433:470513

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=722279

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgquyUsQoM


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

android-nexus6
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_nexus6_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile_classic
  Metric       : v8-gc-incremental-start_sum/browse_news/browse_news_reddit
  Change       : 44.10% | 3.91883333333 -> 2.19066666667

Revision             Result                   N
chromium@470432      3.91883 +- 0.614186      6      good
chromium@470473      3.43317 +- 1.42465       6      good
chromium@470483      3.95417 +- 0.632606      6      good
chromium@470488      3.931 +- 0.676962        6      good
chromium@470489      4.16033 +- 1.07753       6      good
chromium@470490      2.24517 +- 0.405215      6      bad       <--
chromium@470491      2.3885 +- 0.79282        6      bad
chromium@470493      2.198 +- 0.0933381       6      bad
chromium@470513      2.19067 +- 0.40122       6      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=browse.news.reddit v8.runtimestats.browsing_mobile_classic

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979537302883015008

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5389283982049280


| 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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