"bill.burke(a)jboss.com" wrote : Adrian, I'd have to disagree as the number of JbossXB classes will probably be very similar to the number of JAXB annotated classes that AS will use. Which actually argues against it being the classloading making a difference in this test. ;-) | $ jar -tf jboss-xml-binding.jar | wc -l | 351 | So your argument is reversed once there are more than ~350 classes in all the object models that need to be parsed, e.g. | $ jar -tf jboss-metadata.jar | wc -l | 812 | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4257960#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...