Improve CachingWrapperFilter to optionally also cache acceptDocs, if identical
to liveDocs
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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
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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