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Issue 776768 link

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Issue metadata

Status: Duplicate
Owner: ----
Closed: Oct 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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13.5%-62.4% regression in system_health.memory_mobile at 510077:510116

Project Member Reported by pmeenan@chromium.org, Oct 20 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Oct 20 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=776768

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=de1356db320ede2e73e7b5eba979fd950926bbddddb2a0bd0994c4882fda82c3


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

android-webview-nexus6
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Oct 21 2017

Mergedinto: 776929
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Yi Gu
  Commit : bf1ce6b9e9cffee8a73f4cf3bc8658d0de2e7924
  Date   : Thu Oct 19 16:26:20 2017
  Subject: Remove the feature SkipCompositingSmallScrollers

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:cc:effective_size_avg/load_search/load_search_taobao
  Change       : 58.95% | 23426370.6667 -> 37236584.0

Revision             Result                   N
chromium@510076      23426371 +- 2751992      6      good
chromium@510096      23426371 +- 2751992      6      good
chromium@510101      22923928 +- 0.0          6      good
chromium@510102      37236584 +- 0.0          6      bad       <--
chromium@510103      37236584 +- 0.0          6      bad
chromium@510104      37236584 +- 0.0          6      bad
chromium@510106      37236584 +- 0.0          6      bad
chromium@510116      37236584 +- 0.0          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.search.taobao system_health.memory_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965206147750533312


For feedback, file a bug with component Speed>Bisection

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