[plt-scheme] Help writing non-trivial applications.

>Geoffrey S. Knauth wrote:
>
>I guess through FFI we could now call something else that was faster,
>for the critical bits.  If I were trying to keep things in the same
>religion...has anyone used PLT to call a faster Scheme?
>

I use PLT to call Mathematica, which can do some computation faster
(in a Scheme-ish way), and supports arbitrary precision arithmetic
as GMP does.