Comment by renhanxue

If you really care about performance though you'd want to be a lot more specific than this. I've seen image processing code that not only does things like avoid specific instructions on some CPU families (like for example it avoids the vpermd instruction on Zen1/2/3 CPU's because of excessive latency), but also queries the CPU cache topology at runtime and uses buffer allocation strategies that ensure that it can work in data batches that fit in cache.