Re: Re: Re: Believably slow..

[ant9000]

I've been trying your optimized code on my machine (an old Duron 700MHz, under medium load):

$ time ./bench.pl
187692

real    17m12.507s
user    10m3.640s
sys     0m1.300s

so it's still very slow compared to what it does.
Then, I've tried to compile it:

$ perlcc -O -o bench bench.pl
$ time ./bench
187692

real    12m35.665s
user    6m1.480s
sys     0m0.720s

It still is definitely slow, but you get an evident boost in performance just by compiling it into C code... something to remember for situations in which you really need Perl for doing lengthy tasks.

[diotalevi]

Well... at that point you should be using Inline::C. You write just that one function in C and leave the rest in C. You should not be under the illusion that perlcc is a substitute for that. In fact, Inline::C is one of the premier ways to interface with C stuff these days. You'd probably even want to pick it over XS when possible.