gistfile1.clj

;new num branch results

(defn fib [n]
  (if (>= 1 n)
    1
    (+ (fib (dec n)) (fib (- n 2)))))

(time (fib 38))

"Elapsed time: 3716.828 msecs"

;note, no change to body

(defn ^:static fib ^long [^long n]
  (if (>= 1 n)
    1
    (+ (fib (dec n)) (fib (- n 2)))))

(time (fib 38))

"Elapsed time: 380.448 msecs"

Could you explain the syntax is that new?

See http://clj-me.cgrand.net/2010/06/10/primitive-types-support-for-fns-coming-to-a-clojure-branch-near-you/

Greater than or equal? Shouldn't it be less than or equal?

Durrr, nevermind, you inverted the condition. Ignore me.