Render xml.. too slow !!!

Question

so:
I have a servlet , this servlet is divided in tree great sub-functions
- getPost() gets data from POST
- loadData() loads data inside the Object building a DOM
- render() take from every class the xml ( in cascade) and then do a render
the problem is in this last step.
(the application permits to do operations with a database SQL so, shows 'n' records with some buttons for edit, add etc....)
- getPost() 0.0 seconds
- loadData() 0.390 seconds
- render() 1.976 seconds
obviously the problem is in the render function
And here I do my question :
how can I reduce the computing time for rendering ?
how can taglibs help me ? ( if it can )
thanks

Answer 1

- sorry, I can't show you a lot of code because of the copyrights :)
I can tell you how it works ...
the render(Document xml) takes the xml Document and renders it with and xsl pre-setted ...that's all
- yes, I'm using XSLT
- yes the profiles says that the problem is here
there isn't another 'custom' method inside the render() :
Transformer transformerXsl =
factory.newTransformer(new StreamSource(new File(xslPath)));
transformerXsl.transform(source, htmlStream);
the bottleneck is here ... :(