If @1 second recompile entails watching grass grow, you have some serious miracle grow on hand ;-) SBT sub projects are the ticket to sane Scala development. I

If @1 second recompile entails watching grass grow, you have some serious miracle grow on hand ;-) SBT sub projects are the ticket to sane Scala development. If you just lump everything under a single project, sure, then it's grass growing time o_O Modularize your code and then play> ~run (i.e. incremental compilation) and relax -- the "Scala is slow" mantra is so 2011.