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https://issues.apache.org/jira/browse/LUCENE-5115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-5115:
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Attachment: LUCENE-5115.patch
Patch with a few more goodies:
* DISI.cost() now returns the exact cardinality,
* the index now uses MonotonicAppendingLongBuffer and freeze()
* the binary search in advance() favors close targets
I'll commit soon.
> Make WAH8DocIdSet compute its cardinality at building time and use it for
> cost()
> --------------------------------------------------------------------------------
>
> Key: LUCENE-5115
> URL: https://issues.apache.org/jira/browse/LUCENE-5115
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-5115.patch
>
>
> DocIdSetIterator.cost() accuracy can be important for the performance of some
> queries (eg.ConjunctionScorer). Since WAH8DocIdSet is immutable, we could
> compute its cardinality at building time and use it for the cost function.
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