/usr/lib/s9fes/time.scm is in scheme9 2010.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | ; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2010
; See the LICENSE file of the S9fES package for terms of use
;
; (time form) ==> object
;
; The TIME procedures evaluates FORM, measuring the number of
; allocation, reductions, etc with the STATS procedure. It also
; measures the time spent reducing FORM. When finished, it prints
; some interesting data and returns the normal form of FORM.
; The FORM must be quoted or it will be reduced *before* running
; TIME.
;
; (Example): (time '(begin (expt 2 10000) #t)) ==> #t
; ; 1.8990 seconds
; ; 350 reduction steps
; ; 8,327,846 conses allocated
; ; 8,329,127 total nodes allocated
; ; 73 garbage collections
(require-extension sys-unix)
(load-from-library "format.scm")
(define (time form)
(letrec
((sval->integer
(lambda (sval)
(let loop ((sval sval)
(int 0))
(if (null? sval)
int
(loop (cdr sval)
(+ (* 1000 int)
(car sval)))))))
(seconds
(lambda (t0 tn)
(let ((d (- (car tn) (car t0))))
(if (< (cadr tn) (cadr t0))
(- d 1)
d))))
(useconds
(lambda (t0 tn)
(let* ((d (if (< (cadr tn) (cadr t0))
(- 1000000 (- (cadr t0) (cadr tn)))
(- (cadr tn) (cadr t0))))
(s (number->string d))
(k (string-length s))
(s (string-append (make-string (- 6 k) #\0) s)))
(substring s 0 4)))))
(let* ((t0 (sys:gettimeofday))
(result (apply stats form '()))
(sval* (cdr result))
(tn (sys:gettimeofday)))
(format #t "; ~15@A.~4,,,'0:A seconds~%~
; ~20,,:D reduction steps~%~
; ~20,,:D conses allocated~%~
; ~20,,:D total nodes allocated~%~
; ~20,,:D garbage collections~%"
(seconds t0 tn)
(useconds t0 tn)
(sval->integer (car sval*))
(sval->integer (cadr sval*))
(sval->integer (caddr sval*))
(sval->integer (cadddr sval*)))
(car result))))
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