Subject: Re: [xsl] XSLT 1 vs. 2 stylesheet performance issues From: "Ilya Sterin" <sterini@xxxxxxxxx> Date: Mon, 4 Aug 2008 13:23:43 -0400 |
So here is the result of a time profile... This shows a 40X + time difference. $ time java -jar saxonb9-1-0-1j/saxon9.jar -s:test002-meta-1_3.xml -xsl:ODMToClassConfig.xsl -o:out2.xml Warning: at xsl:stylesheet on line 11 column 68 of ODMToClassConfig.xsl: Running an XSLT 1.0 stylesheet with an XSLT 2.0 processor real 0m2.189s user 0m1.954s sys 0m0.146s #### Saxon 6 (XSLT 1.0) ##### $ time java -jar saxon6-5-5/saxon.jar -o out1.xml test002-meta-1_3.xml ODMToClassConfig.xsl real 1m36.175s user 1m32.081s sys 0m1.888s Ilya On Wed, Jul 30, 2008 at 5:39 PM, Michael Kay <mike@xxxxxxxxxxxx> wrote: >> 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. > > Well, it's certainly not related to the fact that it's an XSLT 2.0 > processor. There is absolutely no intrinsic reasons why an XSLT 2.0 > processor should be faster at processing a 1.0 stylesheet than a 1.0 > processor. It's more likely that development on most 1.0 processors came to > a bit of a standstill about 5 years ago. >> >> The processor seems to take most of the time in starting the >> transformation. Using oxygen, the debugger says Starting >> transformation and stays there for about 10 minutes before >> transforming in a matter of seconds. > > Sounds to me as if you're short of memory. The startup phase will be > building the document tree in memory, and will thrash the paging file if > there isn't enough memory to hold it. Check the paging activity, allocate > more memory if you can. How big is the source document? > > Though there aren't any significant changes in the TinyTree structure > between Saxon 6.x and 9.x that would account for such a difference during > tree building. What is the -t output from Saxon 6.x and from Saxon 9.x? > > Michael Kay > http://www.saxonica.com/
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