Re: [xsl] Speed problem

[Michael Kay <mike@xxxxxxxxxxxx>]

It's impossible to tell you how to speed this up without more 
information, and in particular without seeing your XSLT code.

It's often useful to know how the performance changes if you double the 
source document size. If it increases non-linearly, that's a strong hint 
that you either need to introduce keys, or try it with Saxon-EE which 
will often do the same optimization automatically.

How long does the same transformation take if you run it from the 
command line (use -repeat:10 and -t)? That would show whether you need 
to look at API issues, for example the time taken by JAXP to search the 
classpath for an XSLT engine, or inefficient ways of constructing the 
source document or serializing the output.

Michael Kay
Saxonica

On 17/10/2011 08:42, Bartolomeo Nicolotti wrote:
> Hello,
>
> I could not attach .zip with Evolution client, but I hope the question
> is clear enough
>
> Many thanks
>
> Best regards
>
> Bartolomeo
>
> Il giorno lun, 17/10/2011 alle 09.36 +0200, Bartolomeo Nicolotti ha
> scritto:
> > To whom it may concern.
> >
> > we've an XSLT to translate quite big xml, and we want to improve the
> > translation time
> >
> > We translate starting from the attachment
> >
> > 192.168.0.103.log_2011-10-14.log.20111014084051032-1.HBD.xml  (1.8Mb)
> >
> > with this output:
> >
> > 192.168.0.103.log_2011-10-14.log.20111014084051032-1.HBD.out.xml
> > (3.2Mb)
> >
> > for which we've this translation times:
> >
> > 16:44:43,807 INFO  [main] Main  -
> > javax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl
> > 16:44:43,811 INFO  [main] Main  - launchFile: launch.xml
> > 16:44:44,280 INFO  [main] JAXPSAXProcessorInvoker  - Transforming...
> > 16:44:46,983 INFO  [main] JAXPSAXProcessorInvoker  - Done.
> >
> > we need to speed-up the transformation, we currently already compile
> > the stylesheet only once and the re-use the compiled Transformer
> >
> > Could you please advise us with some hint about how to improve the
> > timings or how to profile the transformation?
> >
> > Many thanks
> >
> > Best regards
> >
> > Bartolomeo