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https://issues.apache.org/jira/browse/SANDBOX-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226447#comment-13226447
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Emmanuel Bourg commented on SANDBOX-413:
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Instances of CSVFormat cannot become mutable, otherwise the predefined formats
could be changed.
> CSVFormat fluent API is rather inefficient
> ------------------------------------------
>
> Key: SANDBOX-413
> URL: https://issues.apache.org/jira/browse/SANDBOX-413
> Project: Commons Sandbox
> Issue Type: Improvement
> Reporter: Sebb
>
> The implementation of the CSVFormat fluent API is rather inefficient, as each
> method invocation clones the original class instance.
> Now that the fields are volatile, it would be possible to do away with the
> clone() calls entirely.
> This would mean that the format could be updated later.
> If such usage is not desirable, then perhaps consider adding some kind of
> "freeze" method to prevent further changes.
> Or perhaps the parse() and format() methods could perform the freeze (e.g.
> set a flag to disable further updates).
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