We can build our main application in about eight to ten minutes using XCode. Project Builder used to take much longer, so XCode is an improvement Using just a simple makefile and GCC, we can build the same app in about 30 to 40 seconds. When I worked with Codewarrior back on Mac OS 8 and 9, I remember blazing fast compile times on the order of 20 to 40 seconds for projects of this size. What is XCode doing that causes it to take so long?