Eclipse rocks - when it's awake. But using it on Windows, I've found that it has a tendency to drop off - if I've not used it for a while, or especially if I've minimised it, it often takes a good twenty or more seconds to start moving again, and even than it takes a long time before it starts to respond snappily.

The KeepResident Eclipse plug-in seems to fix this. It works for me, anyway.

"Windows has a tendency to preemptively swap Java processes out of physical memory, even when there is still plenty of physical memory available." Hmmm. You could almost think that this was deliberate, couldn't you? No, it's not possible - Microsoft would never behave in an underhanded fashion like that, would they.