Those kind of optimizations aren't needed on big desktop CPUs these days, they don't need special scheduling or anything. And yes, when it's important it does

Those kind of optimizations aren't needed on big desktop CPUs these days, they don't need special scheduling or anything. And yes, when it's important it does do that. They aren't stupid. (An example is that unaligned SSE loads are very slow on some CPUs but faster on others.)