I've tried turning off DEBUG level. It doesn't make much difference in performance (although my log files are much smaller now). I've checked XSDs and that's not the problem too. I'm using server side state saving. Why APPLY_REQUEST_VALUES takes about 1 sec and org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter spends ~sec parsing? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077751#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...