Build time without magic powers activated: 16 seconds.
Build time with magic powers activated: 1 second.
See that? That 16 seconds may not sound like much to most people, but when you're trying to solve some specific problem, and you're in the middle of a build/debug/repeat cycle, that 16 seconds gets real damned old, real damned fast.
Alright, here's the magic...
Precompile Prefix Header
Yeah, it's that simple.