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Issue 725549 link

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Issue metadata

Status: Fixed
Owner:
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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42% regression in speedometer at 473832:473853

Project Member Reported by pmeenan@chromium.org, May 23 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=725549

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgus2apQsM


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

android-webview-nexus6
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, May 24 2017

Cc: pva...@inf.u-szeged.hu
Owner: pva...@inf.u-szeged.hu

=== Auto-CCing suspected CL author pvarga@inf.u-szeged.hu ===

Hi pvarga@inf.u-szeged.hu, 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 : pvarga
  Commit : d48794b9728276c1183b0c56f8cb7afe71b7bca4
  Date   : Tue May 23 08:05:19 2017
  Subject: Update TextSelection for non-user initiated events

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : speedometer
  Metric       : Total/Total
  Change       : 42.80% | 25864.4305556 -> 36933.4697222

Revision             Result                  N
chromium@473831      25864.4 +- 413.59       6      good
chromium@473833      25791.8 +- 410.412      6      good
chromium@473834      36797.4 +- 196.75       6      bad       <--
chromium@473837      36826.3 +- 444.822      6      bad
chromium@473842      36973.6 +- 207.832      6      bad
chromium@473853      36933.5 +- 330.748      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests speedometer

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8978787305766804912

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5757443847487488


| 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!
Status: Fixed (was: Untriaged)
This patch got reverted and the regression went away.

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