ref: c48cb65963f0fab8576020a00a04578f1d23e2b9
dir: /test/bench.lsp/
(load "test.lsp")
;; each benchmark is repeated N times to accomodate
;; for the performance increase of current systems
(define N 100)
;; "Performance and Evaluation of Lisp Systems" (1985), Richard P. Gabriel
(princ "tak: ")
(define (tak x y z)
(if (not (< y x))
z
(tak (tak (- x 1) y z)
(tak (- y 1) z x)
(tak (- z 1) x y))))
(time (dotimes (n N) (assert (equal? 7 (tak 18 12 6)))))
;; same as tak, but:
;; (not (< → (>=
;; (- ... 1 → (1-
;; this will show how extra calls (no inlining) make things slow
(princ "tak_: ")
(define (tak_ x y z)
(if (>= y x)
z
(tak_ (tak_ (1- x) y z)
(tak_ (1- y) z x)
(tak_ (1- z) x y))))
(time (dotimes (n N) (assert (equal? 7 (tak_ 18 12 6)))))
;; q2 - http://lispology.com/show?314T
(princ "q2: ")
(define (q2 x y)
(if (or (< x 1) (< y 1)) 1
(+ (q2 (- x (q2 (- x 1) y)) y)
(q2 x (- y (q2 x (- y 1)))))))
(time (dotimes (n N) (assert (equal? 31 (q2 7 8)))))