How to speedup xcode builds without any project modifications?

Question

Last version or XCode (3.2.1) is running very slow on OS X 10.6.

What kinds of tweaks can you do to your Mac in order to speedup Xcode build process.

Answer 1

Take a look at Activity Monitor and see if any other processes are taking CPU time (e.g. Spotlight or Time Machine). Also look at the System Memory tab in Activity Monitor to see whether you're paging.