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https://issues.apache.org/jira/browse/VELOCITY-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032081#comment-13032081
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Christopher Schultz commented on VELOCITY-801:
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Alexander, one more comment:
If you are concerned about memory usage, consider /not/ using the singleton
Velocity object. Instead, instantiate your own and then you always have the
option of discarding it. If you use the singleton pattern that Velocity
supports, you're right: the singleton will never be collected. Take control of
your own objects and stop using the singleton. It will give you greater
flexibility.
> Velocity 1.7 uses string interning
> ----------------------------------
>
> Key: VELOCITY-801
> URL: https://issues.apache.org/jira/browse/VELOCITY-801
> Project: Velocity
> Issue Type: Bug
> Components: Engine
> Affects Versions: 1.7.x
> Environment: n.a.
> Reporter: Alexander Veit
> Priority: Critical
>
> String interning consumes memory that cannot be reclaimed by the java runtime
> even if the velocity runtime singleton is being discarded.
> This is an issue for server applications that use Velocity (e.g. we have a
> software product that may use tens of thousands of Velocity files to create
> content dynamically).
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