https://makezine.com/article/technology/duffs-device-loop-unrolling-fo/
Duff's Device: loop unrolling for interpreted languages - Make:
May 20, 2008 - In 1983, Tom Duff invented a really strange way to use the C language's switch and case statements for the in code "unrolling" optimization of large
duff s deviceloop unrollinginterpretedlanguagesmake