Grant Ingersoll wrote:
On Aug 30, 2008, at 3:14 PM, Andrzej Bialecki wrote:
I think you can use a FilteredQuery in a BooleanClause. This may be
faster than the filtering code in the Searcher, because the evaluation
is done during scoring and not afterwards. FilteredQuery internally makes
FYI, not sure if this is exactly what you are talking about Andrzej, but
IndexSearcher no longer filters after scoring. This was changed in
https://issues.apache.org/jira/browse/LUCENE-584
Ah, indeed - I was working with 2.3.0 release ... then there should be
no visible performance difference if using the trunk version of
IndexSearcher.
The only difference now between the IndexSearcher method and
ConjunctionScorer would be when the supplied filter would match many
documents. IndexSearcher always runs skipTo on the filter first, so
potentially it would stop at many docIds that aren't matching in the
scorer - whereas the ConjunctionScorer tries to order sub-scorers so
that "sparse" scorers are checked first.
--
Best regards,
Andrzej Bialecki <><
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