Adrien Grand created LUCENE-5115:
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Summary: 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
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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