Created
September 25, 2022 13:03
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memoized fibonacci example on Racket
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| #lang racket | |
| (define (fib n) | |
| (if (< n 2) n | |
| (+ (fib (- n 1)) | |
| (fib (- n 2))))) | |
| (time (fib 35)) | |
| ; cpu time: 5219 real time: 5138 gc time: 747 | |
| ; => 9227465 | |
| (require memo) | |
| (define/memoize (fib2 n) | |
| (if (< n 2) n | |
| (+ (fib2 (- n 1)) | |
| (fib2 (- n 2))))) | |
| (time (fib2 35)) | |
| ; cpu time: 0 real time: 0 gc time: 0 | |
| ; => 9227465 |
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