One way to work around, you can write an init servlet to load these jars when you start Tomcat. Of cause these will increase Tomcat startup time.
-----Original Message----- From: J.Pietschmann [mailto:[EMAIL PROTECTED] Sent: Friday, February 06, 2004 3:12 PM To: [EMAIL PROTECTED] Subject: Re: Why is FOP MUCH slower the first time than all other runs? Robert Paris wrote: > I don't think it's the tomcat issue, it takes a long time the first time > even when I call it from a java class (if the class creates a pdf then > creates another one before exiting, the second one is much faster). It's > got to be in the FOP. Is there a way to fix this? 1. It has to load all the classes from the jars. 2. Some static data is set up while loading classes, for example the tables mapping the FO names to factories. There's a lot of object creation and such going on at this time. The current implementation has certainly room for improvement. Several ideas have been discussed, here as well as for other software facing similar problems. Unfortunately, Java doesn't allow for really static memory initialization like C/C++ does, which, together with the lack of plain function pointers, makes further optimization of the mapping tables somewhat difficult. If you have ideas, please post. Well, the static data as well as various instance data is quite often initialized too eagerly. I'll be indebted to anyone who scrutinizes the whole setup for places where postponing creating a variety of ArrayLists and HashTables is a win. IIRC in the example I used for tracking down the table area problems there were 800000 HashTables created, of which only 200000 ever saw an element put into it (the average number of elements for hash tables with at elast one element was less than 1.2). J.Pietschmann --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
