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https://issues.apache.org/jira/browse/JENA-1559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16509539#comment-16509539
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ASF GitHub Bot commented on JENA-1559:
--------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/jena/pull/431


> Avoid unnecessary prefix loading in GraphPrefixesProjection 
> ------------------------------------------------------------
>
>                 Key: JENA-1559
>                 URL: https://issues.apache.org/jira/browse/JENA-1559
>             Project: Apache Jena
>          Issue Type: Task
>    Affects Versions: Jena 3.7.0
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>            Priority: Major
>
> {{GraphPrefixesProjection}} loads all prefixes from the database (JENA-81). 
> It was done that way because {{PrefixMappingImpl}} has internal 
> datastructures that are not passing through lookup misses. 
> Load as needed and rework the way the prefix implementation to cleanly 
> separate algorithms from storage.
> Leave {{PrefixMappingImpl}} untouched - its name and details are too 
> well-known.
>  
>  



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