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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-2493) Use unsynchronized collections in BackingStoreHashtable
Date Mon, 29 Jun 2009 14:11:47 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dag H. Wanvik updated DERBY-2493:
---------------------------------

    Derby Categories: [Performance]

> Use unsynchronized collections in BackingStoreHashtable
> -------------------------------------------------------
>
>                 Key: DERBY-2493
>                 URL: https://issues.apache.org/jira/browse/DERBY-2493
>             Project: Derby
>          Issue Type: Improvement
>          Components: Store
>    Affects Versions: 10.3.1.4
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>            Priority: Minor
>             Fix For: 10.3.1.4
>
>         Attachments: derby-2493-aggregate.diff, derby-2493-aggregate.stat, derby-2493-assert.diff,
derby-2493-assert.stat, derby-2493-hashtable.diff, derby-2493-vector.diff, derby-2493-vector.stat
>
>
> BackingStoreHashtable uses a Vector and a Hashtable, but doesn't need the synchronization
provided by these classes (I think). Replacing them with ArrayList and HashMap could improve
performance for some kinds of operations.

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