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