Considering the first thing I saw in the thread was https://news.ycombinator.com/item?id=48244891 where the values returned from sp's sine function was compared to the correct values, I'm going to take any such opinions with a few grains of salt. Because the correct sine for the number they tested (31337 radians) is 0.3772 (0.3771522646 according to my calculator), sp's implementation returned 0.4385. That's not even close to right.