Well, okay... it's not really "true" benchmarks, but a couple real world things I've observed since upgrading this site to MySQL Cluster 7.3 (ndbcluster storage engine of course). Load average on data nodes immediately decreased without any changes to queries or volume of queries. In fact, when you factor in some of the nodes are running unrelated processes (our search engine spider, memcached, php-fpm, etc.), the CPU resources required for data nodes decreased by about 30%. It's pretty obvious what day we upgraded to MySQL Cluster 7.3... Another unexpected thing that 7.3 did for us is it seems to handle the IN() operator vastly better within queries (queries that used IN() and took ~10 seconds under 7.2 instantly went to ~0.1 seconds (so an unexpected 100x increase in those queries was definitely welcome).