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Issue 763275 link

Starred by 1 user
Status: Duplicate
Merged: issue 762940
Owner: ----
Closed: Sep 2017
Cc:
█ petermarshall@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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14.5%-21.7% regression in v8.browsing_mobile at 499617:499882

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

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

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=763275

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6802272a5e60161326a820e3fd9e7a0a46f9a856bfb91bd2db41885dabeb4191


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

android-nexus5X
android-nexus7v2
chromium-rel-mac11
chromium-rel-mac11-pro
Project Member

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

Mergedinto: 762940
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : 2eb3c8ac7ffc6840dc07f5e8312576e107eece23
  Date   : Wed Sep 06 02:01:21 2017
  Subject: cc: Flush after every tile task set completes.

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : memory:chrome:renderer_processes:reported_by_chrome:v8:heap:effective_size_avg/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 30.30% | 47883251.739 -> 62392240.458

Revision             Result                   N
chromium@499797      47883252 +- 6749055      6      good
chromium@499840      48652936 +- 6457086      6      good
chromium@499843      48283754 +- 4875369      6      good
chromium@499844      49800194 +- 4853331      6      good
chromium@499845      62707556 +- 1635894      6      bad       <--
chromium@499846      62684688 +- 1687734      6      bad
chromium@499851      62262026 +- 1523863      6      bad
chromium@499861      62738567 +- 1464221      6      bad
chromium@499882      62392240 +- 2107441      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.tech.discourse.infinite.scroll v8.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969038277903512992


For feedback, file a bug with component Speed>Bisection
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