How do I speed up the gwt compiler?

I'm starting to make heavier use of GWT in my projects, and the performance of the GWT compiler is becoming increasingly annoying. I'm going to start altering my working practices to mitigate the problem, including a greater emphasis on the hosted-mode browser, which defers the need to run the GWT compiler until a later time, but that brings its own risks, particularly that of not catching issues with real browsers until much later than I'd like. Ideally, I'd like to make the GWT compiler itself quicker - a minute to compile a fairly small application is taking the piss. However, I'm using the compile if a fairly naive fashion, so I'm hoping I can make some quick and easy gains. What can I do to get some extra speed? Can I give it more information so it spends less time doing discovery of what to do?