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https://issues.apache.org/jira/browse/NETBEANS-6504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neil C Smith closed NETBEANS-6504.
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Resolution: Invalid
https://issues.apache.org/jira/projects/NETBEANS/issues/NETBEANS-6470
> java code completion slow - poor algorithm choice
> -------------------------------------------------
>
> Key: NETBEANS-6504
> URL: https://issues.apache.org/jira/browse/NETBEANS-6504
> Project: NetBeans
> Issue Type: Bug
> Components: cnd - Code Completion
> Affects Versions: 13
> Environment: gentoo linux, slackware64-current. btrfs and jfs.
> openjdk18, 32GB RAM, 1TB NVME SSD PCI3x4.
> i do not believe this is related to the other bug reports of slow completion
> which seem to be platform specific (ntfs).
>
> Reporter: notzed
> Priority: Major
> Attachments: slow-complete-full.patch, slow-complete-simple.patch
>
>
> I have a class with a mere 3000 constants and it takes a few hundred
> milliseconds to show and (it seems to run twice?) delete the completion popup
> when these constants are imported using a wildcard static import. This makes
> editing extremely tedious and heavily drains a laptop battery.
> I tracked it down to ElementUtilities.isHidden() invoked from
> getLocalMembersAndVars() using an inefficient algorithm to filter results.
> Most of the time time is spent in in toString() via Name::compareContents().
> Perhaps there's a reason it isn't used in this case but addIfNotHidden()
> seems to have been written to address this performance issue but is only used
> in one of the methods which callls isHidden().
> I've attached a couple of patches. One just changes getLocalMembersAndVars()
> to use addIfNotHidden(), the second is more complete and changes all uses of
> isHidden() to use addIfNotHidden() in a consistent way and also removes the
> redundant name comparison in the inner loop.
> I'm sorry, i'm not sure how to trigger all code paths to test the patches.
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