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Issue 787775 link

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Issue metadata

Status: Duplicate
Merged: issue 787771
Owner: ----
Closed: Nov 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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33.7% regression in system_health.common_mobile at 517791:517888

Project Member Reported by hjd@google.com, Nov 22 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Nov 22 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=787775

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=1597569025d6f1c21304f5ab2d22f2def2dc8f5fa69bb3f87537c94e257751dd


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

android-nexus6
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Nov 22 2017

Mergedinto: 787771
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Peter Marshall
  Commit : 365bb5bb4a1dd62908baf0fad9d075fbcab695ed
  Date   : Mon Nov 20 09:50:01 2017
  Subject: [regexp] Add a CSA fast path for replace with global regexp.

Bisect Details
  Configuration: android_nexus6_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : total:500ms_window:renderer_eqt_max/load_tools/load_tools_drive
  Change       : 25.12% | 448.507333333 -> 561.177

Revision                           Result                  N
chromium@517790                    448.507 +- 26.682       6      good
chromium@517815                    441.878 +- 62.01        6      good
chromium@517827                    436.2 +- 67.472         6      good
chromium@517829                    428.445 +- 41.297       6      good
chromium@517829,v8@a9a1671345      471.474 +- 117.056      6      good
chromium@517829,v8@365bb5bb4a      572.177 +- 80.9679      6      bad       <--
chromium@517829,v8@f24a7e758a      581.965 +- 22.8879      6      bad
chromium@517830                    579.599 +- 70.8955      6      bad
chromium@517833                    559.529 +- 43.7976      6      bad
chromium@517839                    565.898 +- 38.6891      6      bad
chromium@517888                    561.177 +- 122.856      6      bad

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.drive system_health.common_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962229692395617968


For feedback, file a bug with component Speed>Bisection

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