RE: Keeping an XML file in memory

> I have an application where I need to keep a rather large 
> (currently ~40MB, can get bigger) XML file in memory.  This 
> document is used exclusively as a source for multiple XSLT 
> transformations.  

Try the Saxon TinyTree. Unlike JDOM, this doesn't allocate a Java object for
each node. The structure is optimized for XPath access, and in particular,
for a read-only tree - JDOM and similar models have extra overhead because
of the need to support updating.

Michael Kay
http://www.saxonica.com/

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