I love that Julia does so many things in so Lispy a way. I wish that other languages like Lush received similar amounts of attention.
In contrast, SBCL uses tagless float arrays, so that array operations tend to be cache friendly. With adequate declarations, numerical code in SBCL tends to very fast (~1-3x C speed). I assume one can do the same with Bigloo and Chicken scheme as well.
http://lists.racket-lang.org/users/archive/2013-April/057487...
This is also the case in Racket.
http://docs.racket-lang.org/reference/flonums.html#%28part._...