On microcontrollers, you might as well change to lookup tables if you are trying to do something real-time with more than 100 operations per millisecond. This

On microcontrollers, you might as well change to lookup tables if you are trying to do something real-time with more than 100 operations per millisecond. This varies by microcontroller obviously.. this comes from reimplementing GLSL shadertoy samples for a neopixel grid.