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https://issues.apache.org/jira/browse/GROOVY-6523?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King resolved GROOVY-6523.
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Resolution: Fixed
Assignee: Paul King
Fix Version/s: 2.5.0-rc-2
This has been improved somewhat with GROOVY-8548. Please open a new issue or PR
if you think further improvements are required.
> Improve Documentation for in DefaultGroovyMethods.intersect(..)
> ----------------------------------------------------------------
>
> Key: GROOVY-6523
> URL: https://issues.apache.org/jira/browse/GROOVY-6523
> Project: Groovy
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 2.2.0
> Reporter: Alex Beardsley
> Assignee: Paul King
> Priority: Minor
> Fix For: 2.5.0-rc-2
>
>
> As noted in GROOVY-1986, the current version of this method is slow compared
> to Java's existing retainAll method for Sets, on the order of 4000% in test
> cases with a significant amount of data and intersections. The performance
> can't be improved due to limitations in the Java API.
> This should be documented, as we would have never chosen intersect(..) if we
> were aware of the performance implications vs. convenience it provides.
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