~ chicken-core (chicken-5) /tests/gobble.scm

 1;;;; gobble.scm
 2;
 3; usage: csi -s gobble.scm [COUNT]
 4
 5
 6(define (run n)
 7  (print "allocating " n " bytes ...")
 8  (let loop ((k 0))
 9    (when (< k n)
10      (let ((x (make-string 1000)))
11	(when (and (zero? (modulo k 100000)) (##sys#debug-mode?))
12	  (print* "."))
13	(loop (+ k 1000))))))
14
15(run (string->number (optional (command-line-arguments) "1000000000")))
16(newline)
17
18
19; time csi -s gobble.scm 1000000000
20;   5 secs
21;
22; csc goobble.scm -o a.out -O4 -b -d0
23; time a.out 1000000000
24;   3 secs
25;
26; (x86, Core2 Duo, 2.4Ghz, 2GB RAM)