[racket] translate from Racket to Common Lisp

On 2012-11-05 08:09:19 -0500, Sam Tobin-Hochstadt wrote:
> It's impressive to note the change in relative performance for Racket
> over past 3 years since you published the benchmarks on the blog --
> Racket has gone from slower than Gambit on the majority of benchmarks,
> sometimes by a significant margin, to faster on most of them, and
> never more than 2x slower (except ctak).

A follow-up blog post detailing what's improved performance-wise would
be great.

(and thanks for the performance!)

Cheers,
Asumu