Filtered query performance increases for Solr 1.4
One of the many performance improvements in the upcoming Solr 1.4 release involves improved filtering performance. Solr 1.4 filters are both faster (anywhere from 30% to 80% faster to calculate intersections, depending on configuration), take less memory (40% smaller), and are more efficiently applied to the query during a search.
In previous Solr releases, filters were applied after the main query and thus had little impact on overall query performance. Filters are now checked in …