Scheme runtime

Which Scheme implementation allows me to check how long a procedure has been running? SICP mentions something about (runtime), but no resource on MIT Scheme says anything.

Just skip that exercise. That's what I did.

>>2
That's what I did as well, I'm just curious.

>>3
That's okay. Let's wait for the answer, then.

sage

(time ...)

You guys are such losers.

How long a procedure has been running?  Sorry, I am a purely functional programmer -- I do not understand the concept of runtime.

I don't know. maybe ask for the time before, and for the time after? something like, supossing a function (time) gets you the actual time, and that you can substract both times
(define (time-run fun)
   (lambda rest
       (let ((init (time)))
           (let ((val (apply fun rest)))
              (print (- (time) init))
               val))))

so time-run gets a function and returns a function that does the same but also it prints the time the function has been running.
what do u think?

I think that you can't ask for time in Scheme.

>>1
Forget it. It's NP-complete.

>>10
You most surely can in MIT Scheme.

>>10
Forget it. It's NP-complete.

>>11,13
P/NP are just implementation details.

>>14
Forget it. It's NP-complete.

>>15
^{Forget it. It's BBCode-complete.}

PLT Scheme

I remember posting this thread. I still don't know how to do this. I still know only LISP.