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   Re: recursion in XML parser

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  • From: Marcelo Cantos <marcelo@mds.rmit.edu.au>
  • To: xml-dev@ic.ac.uk
  • Date: Thu, 15 Apr 1999 13:12:18 +1000

On Wed, Apr 14, 1999 at 09:16:06AM -0700, David Megginson wrote:
> Didier PH Martin writes:
>  > I think that nobody would argue that Java has a lot of virtues that
>  > certainly speed of not one of them. To take your numbers David, If
>  > that part of the application is 10 times faster than any Java
>  > parser and that the app itself is 10 times faster also. The overall
>  > throughput is therefore 10 times faster.
> That's not necessarily the case -- C/C++ have some advantages for fast
> I/O that Java doesn't share, but if your other code is not I/O-bound,
> and if it doesn't require small, tight processing loops, the speed
> difference for the non-parsing code might be much less significant
> (depending on how efficient your VM and OS are at memory-management).

Don't forget string handling.  C/C++ handle strings significantly
faster than Java, and this is generally what one would expect to find
in an application who's domain involves parsing XML.

One other thing does perplex me.  I would have expected I/O bound
behaviour to level Java and C/C++ rather increase the disparity.  I'd
be interested to know the details.



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