[lz400]

Thanks, that's insightful. I haven't thought about it that way but in retrospect it's clear. In practice I think we've all seen that the numpy style construction is quick to write and performs (and reads) much better than "dumb loops", but if you really want to optimize your code, the highway version will give you more control (and will read similar to the dumb loop with some decorations). I guess just more tools in the toolbox!