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Re: Challenge Problem: Merging Network Addresses

by Dominus (Parson)
on Oct 12, 2001 at 02:25 UTC ( #118360=note: print w/ replies, xml ) Need Help??


in reply to Re: Challenge Problem: Merging Network Addresses
in thread Challenge Problem: Merging Network Addresses

That's a great answer. Thanks a lot.

I can believe that Net::CIDR is the fastest way to do this in Perl. Unfortunately, it may be too slow. My test program took about 2.5 minutes to process test file nm5.in. The C program is about 120-150 times faster.

That's a bummer. I was hoping that there would be a Perl solution that would be fast enough to be useful.

--
Mark Dominus
Perl Paraphernalia


Comment on Re: Challenge Problem: Merging Network Addresses
Re: Re: Challenge Problem: Merging Network Addresses
by tachyon (Chancellor) on Oct 12, 2001 at 04:42 UTC

    I was hoping that there would be a Perl solution that would be fast enough to be useful

    Of course if you patched the module with XS and your C code there would be :-) Just a random thought to increase your workload for the benefit of everyone (except perhaps you).

    cheers

    tachyon

    s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print

      Says tachyon:
      Of course if you patched the module with XS and your C code there would be :-)
      Not really. The C program is a complete program that solves this one specific problem. There's nowhere in the Net::CIDR interface to 'patch'; the module doesn't do what this program does, and this program doesn't implement any of the functions that Net::CIDR does.

      Even if I did put it in, there wouldn't be any benefit. At present, you could compile my program and then use:

      #!/usr/bin/perl system("mjd-merge-blocks inputfile > outputfile");
      Then you could call it a "Perl solution", but it wouldn't really be one. Hacking my code into Net::CIDR wouldn't be a "Perl solution" either.

      --
      Mark Dominus
      Perl Paraphernalia

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