SourceKitService吸取内存并将所有进程暂停

I am having a lot of trouble with stupid SourceKitService. It is taking up like 20GB of memory sometimes and just means my lapTop is pretty much useless it is so slow. I am using xCode 6.4 and working in Swift. I am working on a large project so I am sure that contributes to the problem.I am having a lot of trouble with stupid Source