To me the duff's device is just a mechanism to unroll a loop without having to duplicate the code for the trailing case. While you can't use SIMD you can still

To me the duff's device is just a mechanism to unroll a loop without having to duplicate the code for the trailing case. While you can't use SIMD you can still benefit from instruction-level parallelism. It's potentially better in some scenarios where you want to minimize instruction cache usage and there are few iterations of the loop.