2 # aside from this initial boilerplate, this is actually -*- scheme -*- code
3 main
='(module-ref (resolve-module '\''(measure)) '\'main
')'
4 exec ${GUILE-guile} -l $0 -c "(apply $main (cdr (command-line)))" "$@"
7 ;; A simple interpreter vs. VM performance comparison tool
10 (define-module
(measure
)
12 :use-module
(system vm vm
)
13 :use-module
(system base compile
)
14 :use-module
(system base language
))
17 (define
(time-for-eval sexp
eval)
18 (let ((before
(tms
:utime
(times))))
20 (let ((elapsed
(- (tms
:utime
(times)) before
)))
21 (format
#t "elapsed time: ~a~%" elapsed)
24 (define
*scheme
* (lookup-language
'scheme))
27 (define (measure . args)
28 (if (< (length args) 2)
30 (format #t "Usage: measure SEXP FILE-TO-LOAD...~%")
32 (format #t "Example: measure '(loop
23424)' lib.scm~%~%")
34 (for-each load (cdr args))
35 (let* ((sexp (with-input-from-string (car args)
38 (eval-here (lambda (sexp) (eval sexp (current-module))))
39 (proc-name (car sexp))
40 (proc-source (procedure-source (eval proc-name (current-module))))
41 (% (format #t "proc: ~a~%source: ~a~%" proc-name proc-source))
42 (time-interpreted (time-for-eval sexp eval-here))
43 (& (if (defined? proc-name)
44 (eval `(set! ,proc-name #f) (current-module))
45 (format #t "unbound~%")))
46 (the-program (compile proc-source))
48 (time-compiled (time-for-eval `(,proc-name ,@(cdr sexp))
56 (format #t "proc: ~a => ~a~%"
57 proc-name (eval proc-name (current-module)))
58 (format #t "interpreted: ~a~%" time-interpreted)
59 (format #t "compiled: ~a~%" time-compiled)
60 (format #t "speedup: ~a~%"
61 (exact->inexact (/ time-interpreted time-compiled)))