Hello, I've also some serious performance problems with Jsf/Seam. Some of these problems is due to SeamELResolver|getValue. My sample application can stand only 3 users (no think time). The application consumes 50% of the cpu (AIX system - don't have now the processor caractéristics). Average response time = 0,5s - 8tx/s - average page size 55ko (html) . Profiled a page (it's search page with 2 criteria that renders a list) with Wily Introscope. 24.3% of request duration is due to org.jboss.seam.el.SeamELResolver|getValue which calls Namespace.getComponentInstance in a loop. each call to Namespace.getComponentInstance consumes between 2 ou 4 ms. 2% for my Action execution (which calls jpa). I can send the full trace if you're interested (size=400Mo). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4107090#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...