You're right -- I have no idea why fp64 wouldn't be half the speed of fp32, and traditionally it is. I was simply taking them at their word. Maybe they're exagg

You're right -- I have no idea why fp64 wouldn't be half the speed of fp32, and traditionally it is. I was simply taking them at their word. Maybe they're exaggerating or maybe they did what you suggest and hamstrung fp32.