Groups > comp.lang.java.programmer > #24951

Re: java String split() does not work for delimiter "|" ?

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From	Michael Jung <miju@golem.phantasia.org>
Newsgroups	comp.lang.java.programmer
Subject	Re: java String split() does not work for delimiter "\|" ?
Date	Sun, 11 Aug 2013 17:42:27 +0200
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Joerg Meier <joergmmeier@arcor.de> writes:
> On Sun, 11 Aug 2013 11:12:38 +0200, Michael Jung wrote:
>> I use split myself often enough. You can read my response as a case for
>> optimzation surprises. The micro benchmark shows around a 200% boost
>> (3:10), the overall gain was 15%, but the code in question as to the
>> amount of (user-level) code run through was far less than 1% (big "fat"
>> EE application).
> Well, odds are, not many applications spend 25% of their CPU time doing
> .split(), so I would say that your application speeding up that much is an
> extreme edge case. What on Earth do you do that requires millions of
> .split() calls per second, and why did you think that would even remotely
> be a representative example ?

Odds are that the rest of the application was already highly
optimized. (I already said this was for certain use cases.) Whether this
is representative of something, I don't know, everybody has to judge for
himself what to do with split. But string manipulation is omnipresent in
many applications these days.  This was just some light.

Michael

Thread

Re: java String split() does not work for delimiter "|" ? smarty.ad4@gmail.com - 2013-08-08 05:07 -0700
  Re: java String split() does not work for delimiter "|" ? Lew <lewbloch@gmail.com> - 2013-08-08 13:16 -0700
    Re: java String split() does not work for delimiter "|" ? Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2013-08-08 23:46 -0700
      Re: java String split() does not work for delimiter "|" ? Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-08-09 04:45 -0300
        Re: java String split() does not work for delimiter "|" ? Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2013-08-09 23:25 -0700
          Re: java String split() does not work for delimiter "|" ? Michael Jung <miju@golem.phantasia.org> - 2013-08-10 12:37 +0200
            Re: java String split() does not work for delimiter "|" ? Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-08-10 22:33 -0300
              Re: java String split() does not work for delimiter "|" ? Michael Jung <miju@golem.phantasia.org> - 2013-08-11 11:12 +0200
                Re: java String split() does not work for delimiter "|" ? Joerg Meier <joergmmeier@arcor.de> - 2013-08-11 13:32 +0200
                Re: java String split() does not work for delimiter "|" ? Michael Jung <miju@golem.phantasia.org> - 2013-08-11 17:42 +0200
          Re: java String split() does not work for delimiter "|" ? Joerg Meier <joergmmeier@arcor.de> - 2013-08-10 15:34 +0200

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