I have a stateless facade bean that fetches a deep hierarchic structure from my database using ejb3 with eager-mapped relations. This takes 2 seconds (timed with an ejb interceptor). On the client, i wrapped the ejb-proxy in a dynamic proxy, to time remote calls: 11 seconds. What is going on, in between the ejb-interceptor, and the client? Java-serialisation: i timed this, by serialising the fetched data into a byte-array-stream (and deserialising it again): 140ms. (using 4.0.4, rc8 and rc9, hsqldb or mysql, all the same) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3974161#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...