Racket is a lot faster. Python is generally slower than guile, which is a lot slower than racket. Racket is according to my unscientific benchmarks, unless the

Racket is a lot faster. Python is generally slower than guile, which is a lot slower than racket. Racket is according to my unscientific benchmarks, unless the problem lends itself well to an imperative style, in the same ballpark as, but still slower than, C# on mono. Edit: pypy on the other hand is, if the project euler forums are a good source, on par with racket.