Im finding after a few weeks of GWT development my Development Mode compilations suddenly slow down at the stage where you see this in the Development Mode console log:
Validating newly compiled units
I've found a related question but this seemed a little vague compared to my issue
Eclipse getting too slow - workspace recreation helped
Since I lose window/toolbar layout settings (even if export/import prefs) and other useful things when I recreate the workspace I want to find out which files I can clean?
I've raised a bug with GWT..