"Optimizing System Performance" during software installation usually means prebinding libraries. Mac OS X has a number of ideas as to what a library is, too. There's the standard Unix .so "shared object" dynamic library (what you get when you compile software with dynamicly-linked libraries, also known on Windows as a "DLL"), the NextStep concept of a "bundle", the Mac OS 9 concept of, um, whatever, and so on and so forth.

Oh, and just to keep up with the Jones's in OS X (well, Mach/Darwin) systems programming, scripting, and general shell hackery, I give you the new 0.6.0 release of scsh. Don't forget to grab and compile the ubiquitously portable and tres cool Scheme48 first.