I should readjust my 5x statement, it's more like 2.25x.
On Mar 10, 8:39 pm, Jarl Haggerty <jarlhagge...@gmail.com> wrote:
> I've been benchmarking java and clojure programs and wanted to make
> sure I was doing this right. I made two fairly similar programs that
> manipulated Vec2 objects from the JBox2D library. At first clojure
> was performing pretty poorly, then I tried compiling my clojure
> script, and then replacing the inner doseq with a loop. But java is
> still 5x faster and I hear that clojure should be able to run as fast
> as java and I wondered if there's any options in clojure I'm not using
>
> Java:
>
> package test;
>
> import org.jbox2d.common.Vec2;
>
> public class Main {
> static long w = 0;
> public static void main(String[] args) {
> for(int q = 0;q < 5;q++){
> Vec2 a = new Vec2(1, 2), b = new Vec2(3, 4);
> long start = System.currentTimeMillis();
> for(int d = 0;d < 1e9;d++){
> a.addLocal(b);
> }
> long stop = System.currentTimeMillis();
> System.out.println((stop - start)/1000.0);
> }
> }
>
> }
>
> Clojure:
>
> (ns hello.test
> (import org.jbox2d.common.Vec2)
> (:gen-class))
>
> (defn -main [& args]
> (doseq [q (range 5)]
> (let [a (Vec2. 1 2)
> b (Vec2. 3 4)]
> (time (loop [x (int 0)]
> (when (< x 1e9)
> (.addLocal a b)
> (recur (unchecked-inc x))))))))
>
> Vec2(if anyone cares):
>
> http://code.google.com/p/jbox2d/source/browse/trunk/jbox2d/src/org/jb...
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