Date: 2008apr2 Language: C/C++ Warning: This was invented in 1984, now-a-days I would just ask the compiler to optimize (eg -O3 option to gcc). Keywords: duffs Q. What's the most far-out C programming thing? A. Quite possibly Duff's Device. It's mind boggling. It works and is perhaps actually useful in some limited situations. http://en.wikipedia.org/wiki/Duffs_device