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Issue 754630 link

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Issue metadata

Status: Duplicate
Merged: issue 752867
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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85.8%-121.2% regression in v8.runtimestats.browsing_mobile at 492120:492232

Project Member Reported by jgruber@chromium.org, Aug 11 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 11 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=754630

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=70f0739cadd7a2bc834f614cd6cd9320db5bcbf5829c4bba3bc047b11b667ca5


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

android-webview-nexus6
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 11 2017

Mergedinto: 752867
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Jakob Kummerow
  Commit : 05e862f78398d8bbeacc7f9e19bbb41c408e709b
  Date   : Fri Aug 04 01:27:42 2017
  Subject: Cache StoreIC-Transition handlers

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : v8-gc-incremental-start_sum/browse_news/browse_news_washingtonpost
  Change       : 41.22% | 2.6445 -> 3.7345

Revision                           Result                   N
chromium@492119                    2.6445 +- 0.396597       6      good
chromium@492148                    2.247 +- 0.938916        6      good
chromium@492155                    2.3035 +- 1.0039         6      good
chromium@492159                    2.55733 +- 0.873879      6      good
chromium@492161                    2.53917 +- 0.473545      6      good
chromium@492161,v8@5614747680      2.482 +- 0.707832        6      good
chromium@492161,v8@2fd5e70a03      2.362 +- 1.04228         6      good
chromium@492161,v8@9735d7f109      2.80433 +- 0.910584      9      good
chromium@492161,v8@0caf1d2029      2.6715 +- 0.607774       6      good
chromium@492161,v8@05e862f783      3.70283 +- 0.980813      6      bad       <--
chromium@492162                    3.815 +- 0.943285        6      bad
chromium@492176                    3.72967 +- 1.06633       6      bad
chromium@492232                    3.7345 +- 0.901803       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=browse.news.washingtonpost v8.runtimestats.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971564050882260368


For feedback, file a bug with component Speed>Bisection

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