Vector operations optimization.

[Comrad]

I'd like to try d in computational physics. One of the most 
appealing features of the d is implementation of arrays, but to 
be really usable this has to work FAST.
So here http://dlang.org/arrays.html it is stated, that:
"Im­ple­men­ta­tion note: many of the more com­mon vec­tor 
op­er­a­tions are ex­pected to take ad­van­tage of any 
vec­tor math in­struc­tions avail­able on the tar­get 
com­puter."

What is the status at the moment? What compiler and with which 
compiler flags I should use to achieve maximum performance?