I am relatively new to Xcode. We are testing an app that displays incoming data and it needs to be as fast as possible. With other platforms I need to change from "debug" to "release" in order for optimizations to kick in and debug code to be removed, which can have a profound effect on speed. What are the equivalent things I need to do in Xcode to build in fast/release mode?

(I am googling this and see lots of hits that seem to be in the general vicinity but I might be a little thrown off by the terminology, I might need it dumbed down a bit :))

Thanks for the help.