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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 resolved LUCENE-5115.
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Resolution: Fixed
Fix Version/s: 4.5
> 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
> Fix For: 4.5
>
> 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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