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Date: Thu, 11 May 2000 13:59:47 -0400
From: Joseph Shraibman <jks@p1.selectacast.net>
Organization: Xtenit
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To: general@xml.apache.org
Subject: Re: DOM size
References: <3.0.32.20000511085445.014a0370@pop.intergate.ca>
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500 simple Documents in  Xerces-J using version 1.0.2 takes up 53668K. In version
1.0.4 it is 52584K.  A document should not take up 100k.

Documents were created from the String:
<base ><child  field1=\"text\" field2=\"string\" /></base>

Mike Pogue wrote:

> Also note that both Xerces-J and Xerces-C have recently had memory optimizations
> done to the DOM (courtesy of Arnaud LeHors).  In some cases, nodes got 30% smaller,
> at virtually no cost in performance.
>
> So, be sure to measure using the latest 1.0.4 Xerces-J.  Xerces-C will be doing a
> build with these changes in it shortly...
>
> Mike
>
> Tim Bray wrote:
> >
> > At 08:57 AM 5/11/00 +0200, Dennis Thrysoe - netnord wrote:
> > >Does anybody have a ballpark figure on how much memory a DOM would eat up if
> > >it was an entire 16 mb XML file. (The implementation is IBM's XML4J 2.0.15 -
> > >but I'm just looking for a qualified guess).
> >
> > N * 16M, where N ranges between 1.5 for a fine-tuned readonly DOM
> > implementation in C [done by David Megginson but never released I think], to
> > over 20 for some perl implementations.  Also it depends (a lot) on how
> > dense the tags are. -Tim
> >
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