Hi all, I've been developing Struts 2 webapp for nearly a year now and have a great deal of experience with it. Personally, the architecture of Struts 2 is much cleaner than its predecessor. However, recently I converted one of my Struts 2 pages into Servlet + JSP solution and it turns out that Struts 2 performance is much worse than Servlet + JSP. In Servlet + JSP solution, the server CPU is barely over 3-4% while with Struts 2, it's around 70% most of the time. The JSP page is around 300 lines of code. I don't have a chance to do any profiling to find out where is the bottleneck but I suspect it might be OGNL which hinders the performance. I think, we already have a pretty good feature set so we can start thinking about optimising Struts 2. That will probably speed up its adoption in the industry.
The other thing I want to comment on is the use of Dojo as Ajax theme. I don't have much experience with Dojo apart from a few hours playing around with it. However, even with the latest version (0.9), Dojo just seems to be to heavy weight for most purposes. I mean if you only want a bloody calendar in your webapp, you don't want to load up a 100kb of javascript. Plus, it might be my experience only, Dojo seems to have the tendency to hang my browser everytime I open a Dojo-based app. -- Regards, Cuong Hoang
