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From Paul Elschot <>
Subject Re: [jira] Updated: (LUCENE-584) Decouple Filter from BitSet
Date Wed, 06 Sep 2006 07:17:18 GMT

There is another aspect of this influences future performance:

When a Matcher is used to implement filtering, it can also be pushed down
into a boolean query as a required "clause". It would then end up
being called in the tight loop of ConjunctionScorer as one of the
required "clauses", instead of only being called after returning from 
the Scorer for the query.

This pushing down is independent of the actual Matcher, but I think
it would make differences between Matchers more visible.

Paul Elschot

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