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https://issues.apache.org/jira/browse/JENA-237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne closed JENA-237.
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> Quad is mutable
> ---------------
>
> Key: JENA-237
> URL: https://issues.apache.org/jira/browse/JENA-237
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ
> Reporter: Stephen Allen
> Assignee: Stephen Allen
> Priority: Minor
> Attachments: JENA-237 - Immutable Quad.patch
>
>
> I notice that Quad is a mutable object, specifically it lazily caches the
> call of asTriple(). It seems that we can eliminate this caching and make
> Quad an immutable object.
> Benefits:
> - It's really cheap to create a new Triple object on each call to asTriple()
> - Reduce the memory footprint of Quad objects by eliminating at least a
> pointer, and potentially a pointer and a whole Triple object
> - Makes Quad thread-safe
> I didn't just make the change because I didn't know if there was a reason for
> the current situation. Attached patch.
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