One of the first comments made about RPMint was the issue of performance. Specifically that RPM package builds should be done on a PC using a cross compiler. This is reasonably sound advice but not all the packages are going to be cross compiler ready. I have 3 solutions that I think work pretty well though when combined together that I'll talk about.
The first thing is configure cache. I specify as part of the configure script a static configuration file. These options don't (generally) change so there is no reason to recompute them over and over again.