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Issue metadata

Status: Duplicate
Merged: issue 762492
Owner: ----
Closed: Sep 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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3.2%-5.4% regression in memory.top_10_mobile at 499525:499578

Project Member Reported by tdres...@chromium.org, Sep 7 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=763117

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9d900059148f1246e79e7449bb6348e6d7b9beecb85335e7b467464bb5bfc3c0


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

android-nexus5
android-nexus5X
Mergedinto: 762492
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Marja Hölttä
  Commit : 36d703778ccd0d2777e0d4b69ed6e65e39a9f521
  Date   : Mon Sep 04 16:05:39 2017
  Subject: [parser] Tentatively enable FLAG_preparser_scope_analysis.

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : memory.top_10_mobile
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/foreground/https_m_facebook_com_rihanna
  Change       : 5.60% | 5099536.0 -> 5385222.0

Revision                           Result                  N
chromium@499528                    5099536 +- 221033       9      good
chromium@499535                    5182217 +- 322919       9      good
chromium@499538                    5164391 +- 237712       9      good
chromium@499538,v8@1c1457fa70      5130311 +- 207865       6      good
chromium@499538,v8@36d703778c      5418045 +- 533743       9      bad       <--
chromium@499538,v8@7abdadca0e      5405289 +- 292960       6      bad
chromium@499539                    5315228 +- 185953       9      bad
chromium@499540                    5472672 +- 316624       6      bad
chromium@499541                    5380587 +- 340362       6      bad
chromium@499553                    5372876 +- 95513.4      6      bad
chromium@499578                    5385222 +- 344558       6      bad

Please refer to the following doc on diagnosing memory regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/memory-infra/memory_benchmarks.md

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 memory.top_10_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969078683492708560


For feedback, file a bug with component Speed>Bisection

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