Based in my experience with production applications, JSF is not a significant performance concern. I don't know if that is true across the board, but that's my experience. Honestly, I would suspect the overhead of Seam itself is larger than the overhead of JSF, but again I don't see any performance issues in production apps because of it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4072593#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...