Re: XSLT 1 vs. 2 stylesheet performance issues

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/