I know you guys are probably tired of hearing this, but there are still performance issues with Demetra, especially when opening/closing projects.
We have a very large project that is actually a suite of products. There are a lot of dependancies so we can't easily break them up. Roughly 10,000 classes, a couple of thousand jsp's and a thousand or so resource files.
In IDEA 5.1 ( after caching ) our project takes about 15 - 20 seconds to open.
In Demetra it takes 50 - 70 seconds.
Closing the same project in 5.1 takes about 3 seconds.
In Demetra it takes 35! ( It no longer throws an exception on close, but it still locks up the UI for the duration ).