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https://issues.apache.org/jira/browse/LUCENE-8386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16535762#comment-16535762
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Adrien Grand commented on LUCENE-8386:
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Do you have concrete ideas in mind? I see BitSetIterator as an exception, other
Bits-based iterators don't perform well and are better implemented with
two-phase iterators?
> Maybe a DocIdSetIterator may implement Bits?
> --------------------------------------------
>
> Key: LUCENE-8386
> URL: https://issues.apache.org/jira/browse/LUCENE-8386
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Reporter: David Smiley
> Priority: Minor
>
> I was looking at ConjunctionDISI and noted the special case logic for DISI's
> of type BitSetIterator. It seems to only need the more minimal Bits interface
> though it makes references to BitSet specifically. BitSetIterator is a
> concrete class; it would be nice if a DISI could either implement an optional
> interface to expose a Bits or perhaps implements Bits directly. This would
> allow other/custom DISIs that can implement a Bits quickly without being
> forced to use BitSetIterator specifically. Even DocIdSetIterator.all(...)
> could implement this.
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