I've just learned that Doom on the SNES used precomputed lookup tables to compute trigonometry functions because the processor was to weak to compute them in real time. I wonder if modern games couldn't use that trick to eek out a bit more performance.
@BeAware Yeah, I would think that. On the other hand, modern videogames also perform a lot more trigonometry computations so even a small speed-up might get you a couple of extra FPS. Or maybe there are more complex computations that could be cached!