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Issue 781262 link

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



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4.4%-126.8% regression in blink_perf.paint at 512504:513098

Project Member Reported by mustaq@chromium.org, Nov 3 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Nov 3 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=781262

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=21f107176a0c123184831f66f553f10235a998e577cc8f1ed30c6a87486d08ae


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

android-nexus5X
android-nexus6
android-webview-nexus5X
android-webview-nexus6
chromium-rel-win7-gpu-nvidia
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Nov 3 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_webview_nexus6_aosp_perf_bisect
  Benchmark    : smoothness.key_silk_cases
  Metric       : queueing_durations/masonry.html
  Change       : 119.76% | 1.08296984157 -> 2.37990556027

Revision             Result                    N
chromium@512769      1.08297 +- 0.469093       6      good
chromium@512815      1.08626 +- 0.328189       6      good
chromium@512821      0.980633 +- 0.370441      6      good
chromium@512824      0.972383 +- 0.37883       6      good
chromium@512825      2.35814 +- 0.444557       6      bad       <--
chromium@512826      2.22931 +- 0.307295       6      bad
chromium@512827      2.26413 +- 0.567984       6      bad
chromium@512838      2.277 +- 0.404877         6      bad
chromium@512860      2.37991 +- 0.448539       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 --story-filter=masonry.html smoothness.key_silk_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963933956204118192


For feedback, file a bug with component Speed>Bisection
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