Thank you so much for this comment. I think Russ Cox (along with many others) is way too quick to declare that removing one source of UB is worth a (purportedly

Thank you so much for this comment. I think Russ Cox (along with many others) is way too quick to declare that removing one source of UB is worth a (purportedly) minuscule performance reduction. While I'm sure that's sometimes true, he hasn't measured it, and even a 1% slowdown of all C/C++ would have huge costs globally.