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https://issues.apache.org/jira/browse/LUCENE-5425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13890892#comment-13890892
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Shai Erera commented on LUCENE-5425:
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I think we shouldn't rush into changing this. Would be good if we can show that
there's another DocIdSet which actually improves performance for some cases.
Otherwise, we're generalizing the API for no good reason. That's also what we
saw on LUCENE-5316: small degradation w/ generalization, but actually all data
structures that we tried performed worse, so why generalize in the first place?
> Make creation of FixedBitSet in FacetsCollector overridable
> -----------------------------------------------------------
>
> Key: LUCENE-5425
> URL: https://issues.apache.org/jira/browse/LUCENE-5425
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Affects Versions: 4.6
> Reporter: John Wang
> Attachments: facetscollector.patch, facetscollector.patch,
> fixbitset.patch
>
>
> In FacetsCollector, creation of bits in MatchingDocs are allocated per query.
> For large indexes where maxDocs are large creating a bitset of maxDoc bits
> will be expensive and would great a lot of garbage.
> Attached patch is to allow for this allocation customizable while maintaining
> current behavior.
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