This may help out: https://github.com/apache/lucene-solr/blob/master/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/ScoreNodesStream.java#L208
This points to some code that calculates global idf for a list of terms. Not sure if this matches you use case. It seems to be very fast. Joel Bernstein http://joelsolr.blogspot.com/ On Tue, Jan 24, 2017 at 1:09 PM, Walter Underwood <wun...@wunderwood.org> wrote: > I tried running with the LRUStatsCache for global IDF, but the performance > penalty was pretty big. The 95th percentile response time went from 3.4 > seconds to 13 seconds. Oops. > > We should not need a separate call to get the tf and df stats. Those are > already calculated when doing the first request. I worked on a search > engine that did it that way twenty years ago. > > In the past, there would have been an IP obstacle, but I think that is > resolved. > > wunder > Walter Underwood > wun...@wunderwood.org > http://observer.wunderwood.org/ (my blog) > > >
