Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

Perl Tops "Wide Finder" Results

by perlfan (Curate)
on Nov 21, 2007 at 20:36 UTC ( #652236=perlnews: print w/replies, xml ) Need Help??

Replies are listed 'Best First'.
Re: Perl Tops "Wide Finder" Results
by erroneousBollock (Curate) on Nov 22, 2007 at 01:29 UTC
    For now ;)

    Unfortunately, we should prepare ourselves for the next JoCaml submission to knock at least another 25% off the wf(32) elapsed time :(.

    From what I've read elsewhere, O'Rourke's could be made faster simply by switching from Sys::MMap to MMap. (
    Does the :mmap PerlIO layer introduce significant overhead, as compared to Sys::MMap::mmap()? It'd be nice if you could basically get speedups for free on systems that support mmap.

    What I like about the currently leading Perl solution ( is that it's still a straightforward implementation of an obvious approach to the problem... not too much optimisation necessary to make it run fast.


      AFAICT Sys::MMap and MMap are the same module -- Scott Walters just took it over and updated it for recent perls.
        Ah, you're right. I went looking for where I'd read it...

        The difference is between doing new MMap (slow) and mmap (fast), due to the tie() interface. Don't know if that's still true.


Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: perlnews [id://652236]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others examining the Monastery: (10)
As of 2016-10-25 10:49 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (317 votes). Check out past polls.