If your servlets that take a long time to load and initialize, configure them to load when the server starts. Otherwise, the first client that calls the servlet experiences poor response time when the servlet is loaded to satisfy the request. You can also configure JSPs to load at start-up. If a JSP is loaded at start-up, it is compiled if necessary.
Define the <load-on-startup> property for the servlet or JSP in the Web application’s web.xml file.
