You've made a silly mistake and just did 1/8th the work, so of course it was 8x speedup. I am still wondering how the numbers would look if you could inline ata

You've made a silly mistake and just did 1/8th the work, so of course it was 8x speedup. I am still wondering how the numbers would look if you could inline atan2f from libc. Too bad that isn't easier