Ruwan,
Thanks for your analysis. I'm a bit surprised that using a
StreamSource gives better results than StaxSource. Can you share with
us the stylesheet and the input documents you used in your tests?
Andreas
On 25 juin 08, at 10:12, Ruwan Linton wrote:
Hi devs,
From the performance test figures on this article I found that
performance for the XSLT transformations shows a drastic drop in
performance with increasing the message size. There fore I did some
research on improving the performance of XSLTMediator.
First I though of trying to switch to SAXON as the XSLT processor
thinking that it will be faster than XALAN, but when I try to switch
the transformer it gives an error because of the fact that we create
a StaxSource as the default javax.xml.transform.Source to the
transformer, which seems to be not compatible with SAXON.
Then I have used the dom feature to enable DOMSource as the
transform source and the DOMResult as the result, which was
successful but at the same time was unable to improve the
performance with compared to the xsltc transformer
(org.apache.xalan.xsltc.trax.TransformerFactoryImpl) of XALAN.
Then I did some more tests and thought of removing the StaxSource
and giving the Source as a StreamSource with using the TemporaryData
class backed data source. This has shown a considerable improvement
to the XSLT transformation and now for 5K messages Synapse is 3-4
times faster than the one we are currently having. Also for 1K
messages it shows some improvement. (There is no clear difference
between XALAN xsltc and SAXON-b, though SAXON-b shows a little
better figures)
There for I propose to remove the StaxSource and use the
StreamSource due to the following 2 reasons;
It seems like StaxSource is not compatible with some of the XSLT
processors (SAXON)
Using StreamSource we can get a vast improvement in the performance
for large messages
I would like to use SAXON-b (open source version of SAXON) as the
default XSLT processor, but it has a limitation on Schema awareness.
Well, it doesn't do much harm even though we keep XALAN but
StaxSource has to be replaced with the StreamSource
WDYT?
Thanks,
Ruwan
--
Ruwan Linton
http://wso2.org - "Oxygenating the Web Services Platform"
http://ruwansblog.blogspot.com/
