Performance benchmarks results for 3.9 c.f 4.0?

[Brebner, Paul]

Hi all, just wondering if there are any performance benchmarks available for 
the 4.0 release please (c.f. 3.9.X)? - there are a couple of results that 
suggest there may be some 90% latency increase in 4.0 so it could be useful to 
have reassurance that everything is ok, Regards, Paul Brebner