There is number of config (context) parameters which can be specified for
JSF 1.2 (which is now included in JBoss app server).

List:

http://wiki.glassfish.java.net/Wiki.jsp?page=JavaServerFacesRI#section-JavaServerFacesRI-WhatContextParametersAreAvailableAndWhatDoTheyDo

Are there any performance tweaks which can be done with those?

Thx