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https://issues.apache.org/jira/browse/MNG-7592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17923272#comment-17923272
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Guillaume Nodet commented on MNG-7592:
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This should now be fairly easy to implement.
The {{DefaultModelBuilder}} reads the POM XML using an {{XmlReaderRequest}}
which supports a {{transform}} function. Passing a function that would intern
the required strings (it has a {{context}} parameter to indicate which element
is being parsed) would work.
https://github.com/apache/maven/blob/a5ddd7a56379b972972fe8fdd2d31e801d9a54f8/impl/maven-impl/src/main/java/org/apache/maven/impl/model/DefaultModelBuilder.java#L1269-L1288
> String deduplication in model building
> --------------------------------------
>
> Key: MNG-7592
> URL: https://issues.apache.org/jira/browse/MNG-7592
> Project: Maven
> Issue Type: Improvement
> Reporter: Christoph Läubrich
> Priority: Major
> Fix For: 4.x / Backlog
>
>
> I currently investigate improving memory consumption in m2eclipse (maven ide
> extension) and noticed that one problem is that maven model seem to not
> deduplicate strings, so for large projects (I used apache camel as an
> example), there are a lot of duplicate strings hanging around, e.g. I see
> 12.000 instances of "org.apache.maven.plugins" or around 10.000 of
> "org.apache.camel" (please note that probably not all related to maven!).
> If I look at the Graph of incoming references I see for example that these
> are from Model/Artifact groupId.
> I know that string deduplication in general is hard and even controversial,
> but maybe one could think about such thing at least for the "hotsposts", e,g,
> groupId, artifactId and version or even managementKeys seem good candidates
> to be considered for such thing as these are used all over the place.
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