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Posted to dev@mahout.apache.org by "Sean Owen (Updated) (JIRA)" <ji...@apache.org> on 2012/02/07 19:46:59 UTC

[jira] [Updated] (MAHOUT-963) GenericUserPreferenceArray and GenericItemPreferenceArray use selection sorts

     [ https://issues.apache.org/jira/browse/MAHOUT-963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen updated MAHOUT-963:
-----------------------------

       Resolution: Fixed
    Fix Version/s: 0.7
           Status: Resolved  (was: Patch Available)
    
> GenericUserPreferenceArray and GenericItemPreferenceArray use selection sorts
> -----------------------------------------------------------------------------
>
>                 Key: MAHOUT-963
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-963
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.6
>            Reporter: Bryce Nyeggen
>            Assignee: Sean Owen
>            Priority: Minor
>             Fix For: 0.7
>
>         Attachments: MAHOUT-963.diff
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> Both PreferenceArray implementations use selection sorts with poor performance.  These sorts are invoked during construction of GenericDataModels, causing excessive construction time.

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