Ah, I remember my first job, where I worked on a huge, legacy C++ project. My first day of work was spent building and fixing linker errors. After that, to test it, I rebuilt everything from scratch, and it took about that long, 30-45 minutes. While waiting for it to build, I wrote my own PHP time tracking system (click when I got in, click again when I went home). Ironically, wasting a day on compiling caused me to save hours worth of work keeping track of hours.