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https://issues.apache.org/jira/browse/GROOVY-9236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16920961#comment-16920961
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Daniel Sun commented on GROOVY-9236:
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[~emilles] I'm trying to ask [~melix] for help to review the PR too ;-)
> Avoid unnecessary resolving
> ---------------------------
>
> Key: GROOVY-9236
> URL: https://issues.apache.org/jira/browse/GROOVY-9236
> Project: Groovy
> Issue Type: Improvement
> Reporter: Daniel Sun
> Assignee: Daniel Sun
> Priority: Major
> Fix For: 3.0.0-beta-4
>
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> {{ResolveVisitor}}'s {{resolveFromStaticInnerClasses}},
> {{resolveFromDefaultImports}} and {{resolveNestedClass}} will try to guess
> class qualified name and load. In the process of resolving, lots of time
> wasted on finding non-existing classes. So we should try to resolve classes
> in a determined manner.
> For example,
> For {{java.util.stream.Collectors}}, ① {{resolveFromStaticInnerClasses}}
> will try to guess {{java.util.stream$Collectors}},
> {{java.util$stream$Collectors}}, {{java$util$stream$Collectors}}.
> And ② {{resolveFromDefaultImports}} will guess
> {{java.lang.java$util$stream$Collectors}},
> {{java.util.java$util$stream$Collectors}}, ...,
> {{groovy.lang.java$util$stream$Collectors}}.
> After the precedence of resolving adjusted, the above unnecessary resolving
> can be avoided.
> See the discussion in the dev mailing list:
> http://groovy.329449.n5.nabble.com/Performance-of-the-compiler-tt5750989.html
> and its attachment:
> http://groovy.329449.n5.nabble.com/attachment/5750989/0/CPU-hot-spots.txt
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