http://ix.io/1xRN
fold, map, filter
- There seems to be a lot of (radix-length radix) here.
- It seems that the consequent of the quick exit test of radix-fold would also work for length 32.
- If you switch radix-fold-iter's leaf-length to (min 32 (- length-of-radix position)) you can avoid the modulo call.
- When you have an 'if' block with 'begin's on both branches, it's better to use a 'cond' with a test and an 'else', to avoid the 'begin's.