Hey,
out of curiosity i did some benchmarking on my Macbook Pro 13 i5 2,7 GHz.
I chose a simple naive fibonacci implementation as a candidate
(i know that is not a good comparison value for real-world cases)
The implementation looks like this:
(defn fib [n]
(if (< n 2)
n
(+ (fib (- n 2)) (fib (- n 1)))))
The results are a little bit surprising.
The average time for fib(32) in Clojure was ~ 500ms
The same algorithm in Java takes ~ 15 ms to finish.
That means Clojure it's ~30x slower than Java for this special case.
I also "warmed up" the JVM in both cases. For Clojure i used "criterium".
Can somebody explain? Do i do something wrong? Are there any optimization
<http://www.dict.cc/englisch-deutsch/optimization.html>s possible, e.g.
type hints etc. ?
Does Clojure has problems with recursive functions?
Greetings
Daniel Gerlach
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