diff options
Diffstat (limited to 'tools/tmap.scm')
| -rw-r--r-- | tools/tmap.scm | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/tools/tmap.scm b/tools/tmap.scm index 71d1900..4098d28 100644 --- a/tools/tmap.scm +++ b/tools/tmap.scm @@ -314,8 +314,7 @@ ;;; this is a revision of some code posted in comp.lang.lisp by melzzzzz for euler project 512 -;;; apparently sbcl computes the big case (below) in "about a minute" -- well, so does s7! -;;; 53 secs sbcl, 80 in s7 + #| (define (make-boolean-vector n) (make-int-vector (ceiling (/ n 63)))) @@ -328,7 +327,7 @@ (logior (int-vector-ref ,v (quotient ,n 63)) (ash 1 (remainder ,n 63))))) |# -;;; this is slightly faster +;;; this is slightly faster (using int-vector is better for the largest cases) (define (make-boolean-vector n) (make-vector n #f)) (define boolean-vector-ref vector-ref) (define-expansion (boolean-vector-set! v j) `(vector-set! ,v ,j #t)) @@ -383,7 +382,9 @@ (display r) (newline))) -;;; (display (getr 500000000)) ;50660591862310323 +;;; (getr 5000000) 5066059769259 .5 +;;; (getr 50000000) 506605921933035 6 +;;; (getr 500000000) 50660591862310323 67 (32M, mutable_do) (exit) |