Hello, I'm wondering what performance improvements occurred in Solr JOIN from 4.10.0 to 7.x. I noticed that the performance is quicker, but from looking at the code in JoinQParserPlugin it isn't much change.
I saw that in Solr 5.x passing score=none would invoke Lucene's join algorithm, which can be faster. Are there any other changes? Thank you in advance. -- *Horatiu Lazu*
