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Perl: the Markov chain saw

Re: Re: New regex trick...

by mischief (Hermit)
on Jul 24, 2002 at 13:00 UTC ( #184800=note: print w/replies, xml ) Need Help??

in reply to Re: New regex trick...
in thread New regex trick...

Can you post some benchmarks for the module? Or are the ones you posted above from the module (I'm assuming not).

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Regexp::Keep benchmark
by japhy (Canon) on Jul 24, 2002 at 14:35 UTC
    Here's the code:
    use Benchmark 'cmpthese'; use Regexp::Keep; my $s = "abc.def.ghi.jkl"; cmpthese(-5, { japhy => sub { (my $x = $s) =~ s/.*\K\..*// }, old => sub { (my $x = $s) =~ s/(.*)\..*/$1/ }, });
    In 5.6.1:
    old = 40280.54/s japhy = 74338.79/s
    And with 5.8.0 (using the module, NOT my patch):
    old = 58188.18/s japhy = 102409.25/s
    So there's an appreciable speed-up.

    Jeff[japhy]Pinyan: Perl, regex, and perl hacker, who'd like a job (NYC-area)
    s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;

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