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https://issues.apache.org/jira/browse/LUCENE-5293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14177412#comment-14177412
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Adrien Grand commented on LUCENE-5293:
--------------------------------------

Although the elias-fano set is smaller in the sparse case, it's true that 
RoaringDocIdSet tends to be faster to build and to iterate on. So overall I 
think the RoaringDocIdSet has a better trade-off indeed.

> Also use EliasFanoDocIdSet in CachingWrapperFilter
> --------------------------------------------------
>
>                 Key: LUCENE-5293
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5293
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>            Reporter: Paul Elschot
>            Priority: Minor
>         Attachments: LUCENE-5293.patch, LUCENE-5293.patch, LUCENE-5293.patch, 
> LUCENE-5293.patch, LUCENE-5293.patch
>
>




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