[xsl] Profiling XSLT

[Brian Smith <blsmith at blue dot weeg dot uiowa dot edu>]

What is the best way to profile an XSLT stylesheet? I have one that is 
using a lot of "navigation" between elements in a document using the 
document() function. I suspect that this navigation is making things 
markedly slower. However, I'm also worried that my slow performance 
might be coming from my extensive use of the EXSLT functions module.

I am currently using Saxon 6.5 but I could do the measurements on a 
different XSLT processor if necessary. Saxon 6.5 has a performance 
tracing tool (java -jar saxon.jar -t) but when I use it I get very 
little output. I think this is because most of my logic is in my EXSLT 
functions.

SAXON 6.5 from Michael Kay
Java version 1.3.1_01
Preparation time: 471 milliseconds
Processing file:/C:/md/md-xmi/sql/xmi/Model1.4-Model1.4-XMI2.0.xmi
Building tree for 
file:/C:/md/md-xmi/sql/xmi/Model1.4-Model1.4-XMI2.0.xmi using class 
com.icl.saxon.tinytree.TinyBuilder
Tree built in 170 milliseconds
Building tree for 
file:/C:/md/md-xmi/sql/xmi/Model1.4-Model1.4-XMI2.0.xmi using class 
com.icl.saxon.tinytree.TinyBuilder
Tree built in 40 milliseconds
Execution time: 110090 milliseconds

Thanks,
Brian Smith


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