As we all know JSP will be compiled and converted into Servlets upon their First time access,
this degrades the Performance. So to avoid this in Real Time Applications, JSP are compiled
and converted into Servlets Classes while deploying the Application.

Weblogic :
Place the following in weblogic.xml. precompile

<jsp-descriptor>
  <jsp-param>
    <param-name>precompile</param-name>
    <param-value>true</param-value>
  </jsp-param>
</jsp-descriptor>

Tomcat :
Use this in your Build.xml
 
 <taskdef classname="org.apache.jasper.JspC" name="jasper" >
     <classpath>
         <pathelement location="${java.home}/../lib/tools.jar"/>
         <fileset dir="${ENV.CATALINA_HOME}/lib">
             <include name="*.jar"/>
         </fileset>
         <path refid="myjars"/>
      </classpath>
 </taskdef>

 <jasper verbose="0"
          package="my.package"
          uriroot="${webapps.dir}/${webapp.name}"
          webXmlFragment="${build.dir}/generated_web.xml"
          outputDir="${webapp.dir}/${webapp.name}/WEB-INF/src/my/package" />

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