Any where I can read on forcing to use the iGPU on MBPs when plugged in at compile time to be used for the runtime of an application? I figure there are some speed ups/power savings i can get when running an emulator when i'm not too concerned about fps (and way more concerned about lag between from usb input).

[edit] nvm, I can use this: https://github.com/codykrieger/gfxCardStatus