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Issue metadata

Status: Duplicate
Merged: issue 705394
Owner: ----
Closed: Mar 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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1%-1.4% regression in system_health.memory_mobile at 459634:459664

Project Member Reported by lanwei@chromium.org, Mar 30 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Mar 30 2017

Mergedinto: 705394
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Peter Marshall
  Commit : 14e01da1cf6c02628252ed267ca5043f44d63a5d
  Date   : Fri Mar 24 17:40:22 2017
  Subject: [builtins] Port TypedArrayConstructByArrayLike to CodeStubAssembler.

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/load_tools/load_tools_docs
  Change       : 0.51% | 2661610.66667 -> 2675094.66667

Revision                           Result                  N
chromium@459637                    2661611 +- 94.9386      6      good
chromium@459640                    2661593 +- 189.877      6      good
chromium@459642                    2661593 +- 189.877      6      good
chromium@459642,v8@7273f7011a      2662599 +- 240.178      6      good
chromium@459642,v8@7e08a77deb      2662581 +- 228.642      6      good
chromium@459642,v8@14e01da1cf      2675008 +- 254.747      6      bad       <--
chromium@459642,v8@5fdb5a148e      2677953 +- 15787.9      6      bad
chromium@459643                    2675008 +- 254.747      6      bad
chromium@459648                    2675095 +- 94.9386      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 --story-filter=load.tools.docs system_health.memory_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8983671002681398688

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4734713387810816


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

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