People may want to consider changing the useFilterForSortedQuery option from true to false (or commenting it out) in solrconfig.xml I believe it should result in a speedup for the average query that sorts on something other than score.
Generating and using filters for base queries used to be a win due to: 1) a set of complex queries that were almost never sorted by score, but the sort changed 2) bugs/slowness in Lucene when dealing with multi-segment indicies The deficiencies in Lucene have been corrected, and the introduction of fq filter parameters that are cached separately go a long way toward mitigating #1. The downside to this optimization is extra work when the same base query isn't resorted often, and pollution of the filterCache. I've changed the default to false for the example solrconfig.xml -Yonik
