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https://issues.apache.org/jira/browse/LUCENE-3531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13169747#comment-13169747
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Robert Muir commented on LUCENE-3531:
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can't this just be on segmentreader only?
> Improve CachingWrapperFilter to optionally also cache acceptDocs, if
> identical to liveDocs
> ------------------------------------------------------------------------------------------
>
> Key: LUCENE-3531
> URL: https://issues.apache.org/jira/browse/LUCENE-3531
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/search
> Affects Versions: 4.0
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 4.0
>
> Attachments: LUCENE-3531-identityFix.patch,
> LUCENE-3531-identityFix.patch, LUCENE-3531-identityFix.patch,
> LUCENE-3531-identityFix.patch, LUCENE-3531-identityFix.patch,
> LUCENE-3531-v2.patch, LUCENE-3531.patch
>
>
> Spinoff from LUCENE-1536: This issue removed the different cache modes
> completely and always applies the acceptDocs using
> BitsFilteredDocIdSet.wrap(), the cache only contains raw DocIdSet without any
> deletions/acceptDocs. For IndexReaders that are seldom reopened, this might
> not be as performant as it could be. If the acceptDocs==IR.liveDocs, those
> DocIdSet could also be cached with liveDocs applied.
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