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Issue 782744 link

Starred by 1 user
Status: Duplicate
Merged: issue 780502
Owner: ----
Closed: Nov 2017
Cc:
rmcilroy@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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7.9% regression in loading.mobile at 512430:513091

Project Member Reported by rmcilroy@chromium.org, Nov 8 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Nov 8 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=782744

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=33441f123edbcd82937fc12e634c4256e06549b1aae7dec3c613fe06aefae161


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

android-one
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Nov 8 2017

Mergedinto: 780502
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Koji Ishii
  Commit : 811fe6a25ddee5065812bf50733de963e58832cb
  Date   : Tue Oct 31 14:34:37 2017
  Subject: Add CrashKey to LazyLineBreakIterator on Android

Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : loading.mobile
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/Regular-3G/SlideShare
  Change       : 12.39% | 872.738 -> 980.913166667

Revision             Result                  N
chromium@512429      872.738 +- 54.9493      6      good
chromium@512760      869.757 +- 13.689       6      good
chromium@512802      864.575 +- 26.1834      6      good
chromium@512823      868.725 +- 57.1782      6      good
chromium@512824      856.118 +- 33.0243      6      good
chromium@512825      986.19 +- 11.2616       6      bad       <--
chromium@512826      996.995 +- 37.0831      6      bad
chromium@512828      988.486 +- 29.3109      6      bad
chromium@512833      993.695 +- 45.1561      6      bad
chromium@512843      993.809 +- 62.3796      6      bad
chromium@512926      995.148 +- 22.8734      6      bad
chromium@513091      980.913 +- 29.0215      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=SlideShare loading.mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963474226970896432


For feedback, file a bug with component Speed>Bisection
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