You need to post specific data on what you are testing.
For JSPs, you need to either precompile them (and map them as servlets), or disable de development mode of Jasper. This makes a big difference.
How to disable the development mode of Jasper in JBoss3.2.1?
You can modify the web.xml file located in your deploy\jbossweb-tomcat41.sar directory to tune your web server performance. You may overwrite the default init-params of the JspServlet class that deals with jsp compilation. Read the comments found in the web.xml file for the correct parameters that may be modified to fine tune your server.