Hi, The Marlin renderer (JEP265) uses few Math functions: sqrt, cbrt, acos...
Could you check if the current JDK uses C2 intrinsics or libfdm (native / JNI overhead?) and tell me if such functions are already highly optimized in jdk9 or 10 ? Some people have implemented their own fast Math like Apache Commons Math or JaFaMa libraries that are 10x faster for acos / cbrt. I wonder if I should implement my own cbrt function (cubics) in pure java as I do not need the highest accuracy but SPEED. Would it sound possible to have a JDK FastMath public API (lots faster but less accurate?) Do you know if recent CPU (intel?) have dedicated instructions for such math operations ? Why not use it instead? Maybe that's part of the new Vectorization API (panama) ? Cheers, Laurent Bourges
