Yes, I mean the performance of the application. In the "Myths and Facts" section of your website (Myth 3), there seems to be stated that in some cases running an application with a JIT compiler will give better performance than running the same application, compiled ahead of time.
How is this possible, since in the first case the application has to be compiled+run, while in the second case it only has to be run?
(Can the advantage of knowing the configuration of the machine on which the application is running possibly make up for the extra time spent compiling? Seems unlikely to me...)