Do you have some performance numbers to go with this?
One thing I'd love to see is some JUnitPerf tests added to Lucene's test suite - maybe you could come up with a test case that shows the performance issue explicitly here?
Also, if you are doing this type of query repeatedly, look into using a QueryFilter that uses the most restrictive query as the filter, which will limit the search space of the second query.
Erik
On Thursday, October 23, 2003, at 04:43 AM, Daniel Penning wrote:
Hi
The performance of queries using AND (and +) could be greatly improved.
Example: title:"The Right Way" -> 10 hits text:go -> 100 hits title:"The Right Way" AND text:go -> 5 hits
It looks like both parts of the query are executed seperatly and then they are merged. If Lucene would be able to execute the query with less results (text:go) first and then only check if the second part (title:"The Right Way") matches, those queries would be much faster.
Daniel Penning
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