You are absolutely correct. I was just surprised by the unexpected results. I would have thought that without persistence messages would be processed faster. However it seems that in my case it is irrelevent wether the message is persisted or not. It's like you said. The bottleneck must be elsewhere. Thanks for your help with this Alex View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4097392#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...