I\'m mainly wondering about the affect that garbage collection would have on performance. Is the use of garbage collection frowned upon for release apps?
Another concern
Garbage collection has been around since the 1960s and is used in many released applications. All .NET apps use garbage collection. Apple uses libauto in Xcode.
Garbage collection generally leads to better quality apps in Cocoa since the developer is freed from the memory management burden. There are tons of Cocoa apps that leak! (though it may not a significant amount of memory)
I tend to use gc since since I can turn around my apps faster and don't have to worry about messaging zombie objects!