Both will work. The xor version is an old trick that many years ago was faster t...

		alexscheelmeyer on Oct 26, 2011 \| parent \| context \| favorite \| on: Hello from a libc-free world Both will work. The xor version is an old trick that many years ago was faster to execute. I do not think that is still the case, but there is still the difference that the XOR opcode is only one byte and the mov version is multiple, so it saves a few bytes in the executable.

More importantly, these days, is that it saves a few bytes in the caches.