busywork.mal

(load-file      "../lib/load-file-once.mal")
(load-file-once "../lib/threading.mal")    ; ->
(load-file-once "../lib/benchmark.mal")
(load-file-once "../lib/test_cascade.mal") ; or

;; Indicate that these macros are safe to eagerly expand.
;; Provides a large performance benefit for supporting implementations.
(def! and ^{:inline? true} and)
(def! or ^{:inline? true} or)
(def! -> ^{:inline? true} ->)
(def! -> ^{:inline? true} ->>)

(def! do-times (fn* [f n]
  (if (> n 0)
    (do (f)
        (do-times f (- n 1))))))

(def! atm (atom (list 0 1 2 3 4 5 6 7 8 9)))

(def! busywork (fn* []
  (do
   (or false nil false nil false nil false nil false nil (first @atm))
   (cond false 1 nil 2 false 3 nil 4 false 5 nil 6 "else" (first @atm))
   (-> (deref atm) rest rest rest rest rest rest first)
   (swap! atm (fn* [a] (concat (rest a) (list (first a))))))))

(def! num-iterations 10000)

(println (str "Execution time (in ms) of " num-iterations " busywork iterations on "
              *host-language* ": ")
         (benchmark (do-times busywork num-iterations) 10))