<A target="_blank" href="http://www.ibm.com/developerworks/lotus/library/domino85-performance/index.html?ca=drs-">IBM has posted the performance benchmarks</A> for Domino 8.5 running on AIX, IBM series i, Linux, Solaris, Win64, and zLinux. The results compare Domino 8.5 to Domino 8.0.