3 ms·tldr: compiler replaces /2 with a shift.by elcapitan 9y agotldr: compiler replaces /2 with a shift.iplaw 9y agoWhich is a common knowledge substitution that the OP overlooked.jandrese 9y agoWhich makes it sound like the author shouldn't have been trying to hand assemble for speed. Or maybe treat it as a learning exercise.empath75 9y agoi think it was a learning exercise. It's not like there's any productive use for testing the collatz conjecture.michaelt 9y agoOr maybe treat it as a learning exercise. Is there any other reason to complete a Project Euler question?deleted 9y ago[deleted]