ios - xcode 6.3 storyboard compiles very slow -

well, have been facing issue long time , storyboard ipad, compiles slowly.

note:- there no auto-layout issues in project , project contains 2 storyboard 1 iphone , ipad. iphone's storyboard compiles fast guess there few scenes or view controllers there, ipad's storyboard contains 40 scenes or view controllers , more 30 segues connected each other.

here screenshot:

here mac-mini specification:-

i don't know why facing issue . helpful if knows how make compilation faster or possible so?

i cannot upgrade ram or processor, other iphone project's storyboard compiles fast , don't need so.

p.s question not related programming, have posted in super user site found no answer yet.if 1 flag post inappropriate or not related programming glad if let me know can post question feedback on it.