That's a good point. It's probably more a cache thing than a CPU cycles thing and that might not show up on a straightforward CPU profile. What would happen if

That's a good point. It's probably more a cache thing than a CPU cycles thing and that might not show up on a straightforward CPU profile. What would happen if you used special instructions to try to implement a non-cache-polluting memcpy? Or is that even possible? It's been a while but I seem to think that modern CPUs have a variety of cache control instructions. Zero copy is great but it can be a PITA.