The question here is what can we move directly on VFS? Since if we can get a hold of existing VFS deployment root, things are gonna be fast. e.g. ServletContext --> VFSDeploymentUnit --> VFS root But like I already said, if VFS always goes via URL --> URLConnection --> VFS, then it's gonna be slow as it has no memory of previously exploded jars/entries. Keeping this info around is a potential memory leak, as you have no handle/mechanism to remove it, except some SoftRef handling. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4184766#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...