[racket] Why is this slow?

On 24 Apr 2013 10:42, "Shannon Severance" <srs at s53.me> wrote:
>       (define sqrt-n (inexact->exact (ceiling(sqrt n))))

Racket has integer-sqrt, which saves you defining sqrt-n every time.
Also worth noting is sqr, which covers the occasions you want (* x x) or
(expt x 2)

Customer testimonial:
> I have used integer-sqrt in lots of Project Euler problems. It has never
let me down!
>  - Tim, Epsom

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