Subject: Re: [xsl] XSLT 1 vs. 2 stylesheet performance issues|
From: Michael Ludwig <mlu@xxxxxxxxxxxxx>
Date: Wed, 30 Jul 2008 19:37:15 +0200
I'm a bit stumped by the performance issues we're having. We have an xslt 1 compliant stylesheet that takes 10 minutes to run in xslt 1 processors (Saxon, Xalan, libxslt) and a few seconds in Saxon 9B. I'm not sure what it can possibly be.
I've found that processors may behave very differently with respect to coding patterns, or algorithms. For example, some processors cope well with sibling recursion and others don't.
Some processors may do intelligent high-level optimization, others may not be built to discover such possibilities.
When doing some random tests, I've seen Saxon to scale best and perform most evenly with regard to input size and coding patterns.
With xsltproc, --profile may yield some clues. Other processors have similar switches.