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From "Pons Rudy (JIRA)" <j...@apache.org>
Subject [jira] Closed: (COMDEV-39) [classlib][swing] JList and DefaultListModel performance improvement
Date Mon, 29 Mar 2010 05:12:27 GMT

     [ https://issues.apache.org/jira/browse/COMDEV-39?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pons Rudy closed COMDEV-39.
---------------------------

    Resolution: Invalid

> [classlib][swing] JList and DefaultListModel performance improvement
> --------------------------------------------------------------------
>
>                 Key: COMDEV-39
>                 URL: https://issues.apache.org/jira/browse/COMDEV-39
>             Project:  	 Community Development 
>          Issue Type: Improvement
>            Reporter: Pons Rudy
>            Priority: Minor
>
> Some minor changes in JList and DefaultListModel wich will give better performance for
huge data creation or range removal:
>  - add package-private constructors DefaultListModel(Vector) and DefaultListModel(Object[])
to use directly with JList(Vector) and JList(Object[]). Theses contructors call directly the
Vector(Collection) constructor, wich is must faster than the old insertion method.
>  - modify DefaultListModel.removeRange : the old method remove each element one after
the other, and each deletion cause an array copy. New method use instead subList(fromIndex,
toIndex+1).clear(), wich will result on only one array copy.

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