Please vote for this bug : I know I'm not the only one who has this.

appcode eap 2.0 is so much faster and nicer than 1.6, but the latest eaps build practically the whole project every time.

Sometimes I can literally build, then build again and watch as it rebuilds at least half of my files again for no reason whatsoever.

if you have this too : vote here:

http://youtrack.jetbrains.com/issue/OC-6342

NOTE: it doesn't do it every single time; but I certainly do notice it with frequency - be intereted to know it others are experiencing this.