2010-06-03

ぬか喜びだった件・・・

前述のベンチマークだが、手動CPS変換が間違っていた。
正しくはこう
(define (<=/cps x y k) (k (<= x y)))
(define (-/cps x y k) (k (- x y)))
(define tarai-cps  
  (lambda (x y z k)
    (<=/cps x y
     (lambda (b)
       (if b
    ;ここが違う
    (k y)
    (-/cps x 1 
    (lambda (x2)
      (tarai-cps x2 y z
          (lambda (t1)
     (-/cps y 1 
     (lambda (y2)
       (tarai-cps y2 z x
           (lambda (t2)
             (-/cps z 1
             (lambda (z2)
        (tarai-cps z2 x y
            (lambda (t3)
              ;ここも
              (tarai-cps t1 t2 t3 k))))))))))))))))))
(time (tarai-cps 10 5 0 (lambda (x) x)))
っで、ベンチマークの結果。
Petite Chez Scheme 7.9.4
(time (tarai-org 10 ...))
    no collections
    16 ms elapsed cpu time
    0 ms elapsed real time
    0 bytes allocated
(time (tarai-cps 10 ...))
    10 collections
    125 ms elapsed cpu time, including 0 ms collecting
    0 ms elapsed real time, including 0 ms collecting
    44600752 bytes allocated, including 42111448 bytes reclaimed
(time (tarai-anf 10 ...))
    7 collections
    78 ms elapsed cpu time, including 0 ms collecting
    0 ms elapsed real time, including 0 ms collecting
    29505120 bytes allocated, including 29499488 bytes reclaimed
(time (tarai-lambda 10 ...))
    7 collections
    78 ms elapsed cpu time, including 0 ms collecting
    0 ms elapsed real time, including 0 ms collecting
    29505120 bytes allocated, including 29490760 bytes reclaimed

Gauche 0.9
;(time (tarai-org 10 5 0))
; real   0.016
; user   0.015
; sys    0.000
;(time (tarai-cps 10 5 0 (lambda (x) x)))
; real   0.453
; user   0.407
; sys    0.047
;(time (tarai-anf 10 5 0))
; real   0.031
; user   0.031
; sys    0.000
;(time (tarai-lambda 10 5 0))
; real   0.422
; user   0.375
; sys    0.047
圧倒的じゃないか。。。orz
どう考えてもなしの方向っぽいです、本当に(ry

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