On Sat, 20 Sep 2003, Richard Mixon (qwest) wrote: > Date: Sat, 20 Sep 2003 21:34:45 -0700 > From: "Richard Mixon (qwest)" <[EMAIL PROTECTED]> > Reply-To: Struts Users Mailing List <[EMAIL PROTECTED]> > To: Struts Users Mailing List <[EMAIL PROTECTED]> > Subject: [OT] STL startup times - is caching going on? > > This is a little off-topic, but I am using the Struts EL taglibs in the applications > this is happening. Any suggestions, ideas are > appreciated. (I also posted on the Jakarta taglibs list). > > I am having an issue with large startup times the first time one of my pages runs > that uses JSTL mostly the core library. Subsequent > requests (even for different users on different data) take much, much less time. > > Here is a little more detail. Any ideas are much appreciated. My ISP is pretty irate > because we suck up huge amounts of CPU each > time it happens. > > We are using Tomcat 4.1.24, Java 1.4.1 and Struts 1.1. > > OK, the page uses a couple of nested foreach loops to generate a grid/chart of SVG > markup language. It also uses a couple of small > foreach loops to generate tick marks on an axis. It looks something like: > > Chart page > <embed> tag > include JSP/JSTL page to generate footer. > include JSP/JSTL page to generate x and y axis > JSTL markup to generate main body of chart > include JSP/JSTL page to generate footer. > > The request takes a half second to build the Java objects that the JSTL code uses to > render on the page. But the rendering takes 45 > second on a 650MHZ Sun SPARC III machine and almost that long on a fast Windows > machine (2500 MHZ). > > The second and subsequent times the chart rendering drops down to less than 200 > milliseconds. Then about five minutes later, if the > chart is requested again, it takes the 45 seconds to generate, then 200 milliseconds > for subsequent requests. > > Thanks in advance - Richard
The time delay you're describing sounds more like the typical "compile a JSP page the first time it is encountered" delay more than anything specific to a particular tag library. Are you seeing this kind of thing on JSP pages that do not include JSTL tags, or is it specific to this library. If it's the usual generic case, you should investigate using tools like "jspc" (shipped with Tomcat) to precompile your JSP pages into the corresponding servlets. One other factor to note -- if by "include" in your description above you mean <jsp:include> or <c:import>, then each individual page you're importing also has to be compiled that very first time. Craig --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
