Performance issue in using XSLT

Prabeen · July 9th, 2009, 10:23 AM

Hi all,
I am using XSLT transformation to modify the namespace in soap xml request.I am using it in Java. But I am facing performance issues. Because of this I tried to use XSLTC concept of translets. Eventhough the performance has improved a lot I am still lagging in performance. Is there anything else that can be done for increasing the performance
I am doing the transformation in IBM Websphere application server. Pls help

mhkay · July 9th, 2009, 10:28 AM

There are very many things that could cause your performance problems, but without seeing any of your code, it's quite impossible to suggest what's wrong with it.

Sometimes performance problems are related to document size. You want to avoid having a transformation that takes four times as long when you double the source document size. Try measuring the performance with different input sizes. If this is your problem it can often be solved using keys.

Prabeen · July 9th, 2009, 10:36 AM

Hi Mhkay,
Thanks for your qucik response. Do you want the xml and xsl alone or the Java code that transforms also.

Prabeen · July 9th, 2009, 10:38 AM

Hi Mhkay,
also pls note that the traffic which we tested for this application is 25tps,70 tps,110 tps
(tps- transactions per second). Is it advisable to use XSLT transformation for this kind of traffic volume

mhkay · July 9th, 2009, 10:57 AM

I can't offer to do a detailed performance analysis for you. That's consultancy which I would charge for. If the XSLT code isn't too long, however, then it's worth posting the code, we can have a quick glance at it to see if there's anything glaring.

I wouldn't normally start by measuring throughput, I would focus first on latency (elapsed time for each transformation). However, always measure multiple transformations to ensure that you eliminate Java VM warmup time. Also, make sure you aren't compiling the stylesheet each time you run it. The throughput targets you cite are quite attainable but of course it depends on the size and complexity of the transformations.