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From "Marcel Reutegger (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JCR-1705) Reduce memory usage of transient nodes
Date Wed, 06 Aug 2008 12:32:44 GMT

     [ https://issues.apache.org/jira/browse/JCR-1705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marcel Reutegger updated JCR-1705:
----------------------------------

    Attachment: JCR-1705-refactored.patch

Updated patch to current trunk (ItemStates are not Serializable anymore) and introduced a
NameSet, which works similar to the ChildNodeEntries. The new NameSet is used for the property
names and the mixin type names inside a NodeState. The internal HashSet of a NameSet may be
shared and/or obtained from a simple cache similar to HashCache introduced earlier in JCR-1663.

> Reduce memory usage of transient nodes
> --------------------------------------
>
>                 Key: JCR-1705
>                 URL: https://issues.apache.org/jira/browse/JCR-1705
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Marcel Reutegger
>            Priority: Minor
>         Attachments: JCR-1705-refactored.patch, JCR-1705-refactored.patch, JCR-1705.patch
>
>
> When adding lots of transient nodes, most of them don't have child nodes because they
are leafs. The attached patch initializes NodeState.childNodeEntries with an unmodifiable
empty ChildNodeEntries instance and turns it into a modifiable one only when needed.
> Running a test with 100k nodes (10 children per node) the memory consumption for child
node entries drops from 42MB to 12MB with this patch.

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