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XML tools and big documents (was: Re: Is there a size limitation on XML

  • From: David Megginson <david@m...>
  • To: xml-dev@i...
  • Date: Tue, 1 Sep 1998 12:55:38 -0400

limitation of xml
Ingo Macherius writes:

 > My afterall impression is that most available tools do well with
 > toy examples, but any input being in the MB range easily blasts
 > them. At least that's true for what came from MS so far.

I don't think that that's true in general.  Most of the Java-based XML
parsers I've tried seem to be able to handle Jon Bosak's XML Old
Testament (nearly 4MB) just fine, if somewhat slowly -- I used ot.xml
for routine testing and profiling while developing AElfred, and
AElfred barely kicked up a sweat.

The problem comes if the parser tries to build a tree rather than
simply reporting an event stream.  Depending on the implementation,
document trees tend to be very large.  With a naive tree
implementation, a 10MB document might use 100MB or more of virtual
memory for the document tree -- that'll bring most current desktop
systems to a screeching halt.

All the best,


David Megginson                 david@m...

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