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Groups > comp.lang.java.programmer > #28078

Re: compile directly into a .zip/.jar file?

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On Sun, 13 Apr 2014 15:19:28 +0000 (UTC), Andreas Leitgeb
<avl@auth.logic.tuwien.ac.at> wrote, quoted or indirectly quoted
someone who said :

>
>Other timing experiments, I've made meanwhile, have shown that the
>large directory itself doesn't seem to be the problem.

I remember back in the days of DOS when a customer complained a
machine I had built for him was too slow.  He put 12,000 files about
horse racing in one directory.  Back in the day, directory searches
were linear.

I have been working with the HTMLValidator people to speed up their
program by tracking when files were last verified as error free.  They
were reluctant to use a HashMap, being C++ programmers. I suggested
using a tree of tiny disk files instead. They liked the simplicity of
the idea. However, I was surprised to see they implemented the tree by
converting \ in filenames to _ and storing the tree in one directory.
It is incredibly fast, simply because it avoids revalidating anything
it knows is already good. I wondered which actually would be faster,
tree or their system.  Has anyone ever experimented or have thoughts
on the matter?

A tree would be more compact, and hence more likely to be cached and
more localised. I think modern hashed directories do not slow down
with size.
-- 
Roedy Green Canadian Mind Products http://mindprod.com
"Don't worry about people stealing an idea; if it's original, you'll
 have to shove it down their throats." 
~ Howard Aiken (born: 1900-03-08 died: 1973-03-14 at age: 73)

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compile directly into a .zip/.jar file? Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-04-12 12:30 +0000
  Re: compile directly into a .zip/.jar file? Joerg Meier <joergmmeier@arcor.de> - 2014-04-12 15:02 +0200
    Re: compile directly into a .zip/.jar file? Roedy Green <see_website@mindprod.com.invalid> - 2014-04-12 19:56 -0700
      Re: compile directly into a .zip/.jar file? Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-04-13 15:29 +0000
    Re: compile directly into a .zip/.jar file? Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-04-13 15:19 +0000
      Re: compile directly into a .zip/.jar file? Roedy Green <see_website@mindprod.com.invalid> - 2014-04-13 17:35 -0700
    Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-13 13:53 -0400
      Re: compile directly into a .zip/.jar file? Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-04-13 22:21 +0000
        Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-13 18:40 -0400
    Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-13 14:04 -0400
      Re: compile directly into a .zip/.jar file? Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-04-13 22:52 +0000
        Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-14 21:41 -0400
          Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-15 12:51 +0000
            Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-15 20:00 -0400
              Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-16 12:29 +0000
                Re: compile directly into a .zip/.jar file? Jeff Higgins <jeff@invalid.invalid> - 2014-04-16 10:58 -0400
                Re: compile directly into a .zip/.jar file? Jeff Higgins <jeff@invalid.invalid> - 2014-04-16 12:45 -0400
                Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-16 19:33 +0000
                Re: compile directly into a .zip/.jar file? Jeff Higgins <jeff@invalid.invalid> - 2014-04-16 15:48 -0400
                Re: compile directly into a .zip/.jar file? Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-04-16 16:20 -0400
                Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-16 22:31 +0000
                Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-16 18:43 +0000
                Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-16 18:33 -0400
                Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-17 12:58 +0000
  Re: compile directly into a .zip/.jar file? Roedy Green <see_website@mindprod.com.invalid> - 2014-04-12 19:54 -0700
    Re: compile directly into a .zip/.jar file? Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-04-13 16:08 +0000
  Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-13 23:25 +0000
    Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-14 21:40 -0400
      Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-15 13:38 +0000
        Re: compile directly into a .zip/.jar file? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-15 19:49 -0400
          Re: compile directly into a .zip/.jar file? Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-16 12:38 +0000
  Re: compile directly into a .zip/.jar file? Roedy Green <see_website@mindprod.com.invalid> - 2014-04-13 17:38 -0700

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