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Optimising XPATH search performance

From: "James Hahn" <JamesHahn@-------.--->
To: NULL
Date: 12/3/2004 1:57:00 PM
I am processing an XML file where performance is important. Most of the 
searching is for an element within the current node, but there is one point 
where I have to do a SelectSingleNode from the document root, searching for 
a unique ID, and I suspect this is a slow procedure.

Does anyone know if there's a performance difference if this ID is an 
attribute or an element? Is there any optimising I can do to ensure the 
search is as efficient as possible?

I could pre-process the file to de-normalize it, but for a typical data set 
this about quadruples the size, and I fear that I will not get any overall 
speed improvement.




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