[racket] translate from Racket to Common Lisp

At Sun, 4 Nov 2012 20:35:30 -0500, Sam Tobin-Hochstadt wrote:
> Do you have a sense of why Racket performs poorly on the `paraffins`
> benchmark? 

I wouldn't go so far as "poor" for that result, but, anyway... I think
that benchmark turns out to measure mostly allocation. Racket in 32-bit
mode, where pair and vectors take up half as much space, runs almost
twice as fast as Racket in 64-bit mode.