Index time boosting is different than search time boosting, so asking about performance is irrelevant.
Paraphrasing Hossman from years ago on the Lucene list (from memory). ...index time boosting is a way of saying this documents' title is more important than other documents' titles. Search time boosting is a way of saying "I care about documents whose titles contain this term more than other documents whose titles may match other parts of this query".... HTH Erick On Fri, Jun 4, 2010 at 5:10 PM, Asif Rahman <a...@newscred.com> wrote: > Hi, > > What are the performance ramifications for using a function-based boost at > search time (through bf in dismax parser) versus an index-time boost? > Currently I'm using boost functions on a 15GB index of ~14mm documents. > Our > queries generally match many thousands of documents. I'm wondering if I > would see a performance improvement by switching over to index-time > boosting. > > Thanks, > > Asif > > -- > Asif Rahman > Lead Engineer - NewsCred > a...@newscred.com > http://platform.newscred.com >
