Xcode 6&7 performance on Macbook Air 2012-mid I'm planning to change to MacBook from my PC and I was thinking on buying first an older model as I can't afford a new one currently.
I would use this laptop for Xcode development as well so I'd be curious about the opinions and experiences you have regarding the MacBook Air 2012-mid and 2013-mid models with entry level CPUs and 4GB of RAM.
So my question is: Would it be enough for Xcode development? How fast it performs? Any experience?

Thanks in advance!
I use both Xcode 6 and the 7 Beta on a mid-2009 MacBook Pro with a 2.66GHz Intel Core Duo, 4 GB of RAM, and a 260 GB Intel 530 Series SSD. It's good enough for me to develop apps on, though it's not like I'm using Metal to make 3D games or anything. I personally wouldn't get a MacBook Air, as it's just not a performance laptop and you'd get a lot more out of a slightly older MacBook Pro. The one I have is pretty good for what I use it for: Xcode, Final Cut Pro X, web-browsing, etc. But that's not to say I wouldn't want a newer MacBook Pro.