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Re^3: Finding oldest file in directory

by theorbtwo (Prior)
on Oct 19, 2004 at 13:16 UTC ( #400505=note: print w/replies, xml ) Need Help??


in reply to •Re^2: Finding oldest file in directory
in thread Finding oldest file in directory

Note that the arguments against a perl-based high-water-mark algorithm don't apply to List::Util::max, which, like sort, is written in C. (The overhead of a function call vs the overhead of other opcodes does, however, apply, but that's a very small difference.)

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•Re^4: Finding oldest file in directory
by merlyn (Sage) on Oct 19, 2004 at 13:22 UTC
    Yes, I was talking about builtin Perl sort vs a Perl-coded high-water mark. Your List::Util's max doesn't apply in the referenced case (largest file), because max can't be coaxed to doing an indirection, so you'd need a GRT style translation, or else you're back to open coding it, again.

    The point here is that high-water-mark is one strategy, and sorting is another strategy, with different costs depending on the length. The only real takeaway here is Benchmark will know, because you can't always guess.

    -- Randal L. Schwartz, Perl hacker
    Be sure to read my standard disclaimer if this is a reply.

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[Discipulus]: these opcodes mentioned in the wiki pages are the same opcode perl is translated into? or is just the same term but in different fields?
[zentara]: it's useful if you want to lockup a multicore machine :-)
[zentara]: marto I would give up the key easy with drugs....
[Corion]: Discipulus: No, the Perl opcodes are more high-level than the raw processor opcodes
[zentara]: sodium pentathol and a beautiful woman interogator :-)
[Discipulus]: thanks Corion if so i probably never meet them in my life.. ;=)
[Discipulus]: have you all a nice and relaxing weekend!

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