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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-201) NamespaceRegistry is very slow
Date Mon, 23 Jul 2012 11:55:33 GMT

    [ https://issues.apache.org/jira/browse/OAK-201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420585#comment-13420585
] 

Jukka Zitting commented on OAK-201:
-----------------------------------

bq. and not use expanded names at all here

The name mapper needs to work also with external clients that are using expanded names.

But yes, in {{oak-jcr}} we could well use the prefixed forms of the standard names to avoid
even the hash table lookup.
                
> NamespaceRegistry is very slow
> ------------------------------
>
>                 Key: OAK-201
>                 URL: https://issues.apache.org/jira/browse/OAK-201
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>            Reporter: Thomas Mueller
>
> The NamespaceRegistryImpl.getURI and getPrefix are called a lot, for example by NamePathMapperImpl.getOakName.

> The method doesn't do any caching, which is a problem because it has to read it each
time from the repository. Even if it would do caching, it wouldn't help because it the method
WorkspaceImpl.getNamespaceRegistry creates a new NamespaceRegistryImpl each time it is called.
To allow caching of known mappings, the instance needs to be cached as well.

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