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Issue metadata

Status: Duplicate
Merged: issue 709051
Owner: ----
Closed: Apr 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.3%-11.5% regression in system_health.memory_mobile at 461860:461974

Project Member Reported by pmeenan@chromium.org, Apr 6 2017

Issue description

See the link to graphs below.
 
Mergedinto: 709051
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : vogelheim
  Commit : 1769c7034ba4203c6301d5db5e3081b47585af0d
  Date   : Tue Apr 04 15:38:17 2017
  Subject: [parser/ast] Reduce memory consumption for AstConsString.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:v8:effective_size_avg/load_media/load_media_soundcloud
  Change       : 11.72% | 7514822.66667 -> 8395541.33333

Revision                           Result                  N
chromium@461931                    7514823 +- 57378.3      6      good
chromium@461953                    7543952 +- 58885.2      6      good
chromium@461959                    7529465 +- 87941.0      6      good
chromium@461962                    7494463 +- 109620       6      good
chromium@461962,v8@1769c7034b      8397789 +- 11247.7      6      bad       <--
chromium@461962,v8@6d89de7b9e      8395592 +- 339.034      6      bad
chromium@461962,v8@0bd9f1b8e6      8397768 +- 11184.7      6      bad
chromium@461962,v8@d0e5df3e17      8395701 +- 94.4316      6      bad
chromium@461963                    8269331 +- 692359       6      bad
chromium@461964                    8394784 +- 3143.99      6      bad
chromium@461974                    8395541 +- 514.328      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-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.media.soundcloud system_health.memory_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8983050794873217744

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4620640834813952


| 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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