Hello
I have a Python program doing some intensive computing and would like to
port it to Racket for performance reasons.
I use a generator in Python which has a very low overhead. While writing
some test programs, I seem to have an substantial overhead on using
generators in Racket:
Callback version:
pu@pumbair:~/Projects/LanguageBenchmark$ time ./combis.rkt 20 2 n a
combis_a: total 1048576
real 0m0.849s
user 0m0.694s
sys 0m0.140s
Generator version:
pu@pumbair:~/Projects/LanguageBenchmark$ time ./combis.rkt 20 2 n b
combis_b: total 1048576
real 0m18.022s
user 0m15.738s
sys 0m1.821s
so the generator version is more that 20 times slower (and way slower
than the equivalent Python code).
If this is due to my Racket code being sub-optimal, I'd love to have
some help on this.
Code is at http://pastebin.com/Dtz76e5f .
Regards,
-Patrick
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