[SOLR-5002] optimize numDocs(Query,DocSet) when filterCache is null

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.4, 6.0
• Assignee: Robert Muir
• Reporter: Robert Muir
• Created: 04/Jul/13 01:52
• Updated: 09/May/16 18:58
• Resolved: 05/Jul/13 19:33

Description

getDocSet(Query, DocSet) has this opto, but numDocs does not.

Especially in this case, where we just want the intersection count, its faster to do a filtered query with TotalHitCountCollector and not create bitsets at all...