Re: MLT Performance Degraded Between 4.6.1 and 5.5.2 Solr

After some more digging, I narrowed it down to filtering.  Without any filters, the MLT is back to it's normal performance (8ms average response time for our case).  The issue goes away with 6.0 upgrade.  The hot method is Lucene's DisiPriorityQueue downHeap(), which takes 5X more calls in 5.5.2

MLT Performance Degraded Between 4.6.1 and 5.5.2 Solr

I noticed a 3X performance degradation for MoreLikeThis between 4.6.1 and 5.5.2.  Our configuration:      where text_en is a pretty standard text fieldType. Any pointers? Thanks, Ivan Provalov