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Issue metadata

Status: Duplicate
Merged: issue 735071
Owner: ----
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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10.3%-50.5% regression in smoothness.top_25_smooth at 480336:480369

Project Member Reported by lanwei@chromium.org, Jun 21 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jun 21 2017

Mergedinto: 735071
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Yutaka Hirano
  Commit : 84047549ac37bab70d7306566c912e59131f3e1f
  Date   : Mon Jun 19 04:16:15 2017
  Subject: [Loading] Save one post-task when the data pipe is ready on arrival

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : mean_input_event_latency/http___sports.yahoo.com_
  Change       : 77.00% | 16.4768333333 -> 29.1643333333

Revision             Result                  N
chromium@480335      16.4768 +- 2.61099      6      good
chromium@480340      17.0547 +- 3.00644      6      good
chromium@480341      18.6872 +- 1.67337      6      good
chromium@480342      25.7353 +- 7.20177      6      bad       <--
chromium@480344      24.9128 +- 8.21408      6      bad
chromium@480352      27.844 +- 10.1607       6      bad
chromium@480369      29.1643 +- 6.59756      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=http...sports.yahoo.com. smoothness.top_25_smooth

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976141030730660272

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5023378345295872


| 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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