[jdom-interest] Performance tuning

[Bob Jacobsen]

I'm using JDOM and Xerxes SAX to read some configuration files for an 
interactive application.  One a user button-click, I read one of the 
files. Because the user is going to select one of about 300 
configuration files, I can't usefully read them ahead of time.

A typical file is about 40K in very verbose form, uses a DTD and a 
single namespace, and averages several attributes per element.  You 
can see one at http://jmri.sourceforge.net/demoFiles/NMRA.xml.txt

The problem is that this file takes about 6 seconds to read and parse 
on a 400MHz Powerbook.  This seems excessively long, esp. given some 
of the benchmark times I've seen on the IBM website.  So clearly I'm 
doing something wrong.

Any ideas?

I've searched the mailing-list archive.  There were a couple similar 
posts, but I didn't see any resolutions.  Any suggestions would be 
appreciated.

I'm using the b6 version of JDOM; I've tried b7 without any noticable 
change.  (I'm sticking with b6 for now as I want to only change one 
variable at a time until I've got some understanding).

Bob
-- 
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Bob Jacobsen (Bob_Jacobsen at lbl.gov, 510-486-7355, fax 510-495-2957)