Wow, you're right! That improves the time from 7.11 to 3.94 seconds. I was skeptical because 'add' is inlined, which I expected would eliminate pointless copies

Wow, you're right! That improves the time from 7.11 to 3.94 seconds. I was skeptical because 'add' is inlined, which I expected would eliminate pointless copies, but I guess not!