Is integer multiplication really done at the same speed as addition on a modern CPU?

Question

I hear this statement quite often, that multiplication on modern hardware is so optimized that it actually is at the same speed as addition. Is that true?

I never ca

Answer 1

No it's not, and in fact it's noticeably slower (which translated into a 15% performance hit for the particular real-world program I was running).

I realized this myself when asking this question from just a few days ago here.