> Check link in archive:
>
https://web.archive.org/web/20150308140349/http://kazimirmajorinc.com/Documents/The-speed-of-eval-in-some-Lisp-implementations/index.html
As a Clojure programmer, I find that Clojure code rather...gross. Of course
it's slow, Clojure is optimized completely differently from other lisps. On
my machine the example in the link:
(time (do (def i 1)
(while (< i 1000000)
(def i (+ i 1))
(do (def x 0)
(def x (+ x 1))))))
Takes 1.1sec to run, but no Clojure programmer in their right mind would
abuse global defs that way. The correct implementation is:
(time (dotimes [i 1000000]
(+ 0 i)))
Which completes in .2ms once the JIT warms up (about 4-5 iterations).
Same with the other example:
(time (do (def i 1)
(while (< i 1000000)
(def i (+ i 1))
'(do (def x 0)
(def x (+ x 1))))))
266ms vs:
(time (dotimes [i 1000000]
'(do (def x 0)
(def x (+ x 1)))))
3 ms with a warm JIT
Timothy Baldridge
