评估数学函数的组成

Question

I am evaluating the following function :

// evaluates exp(-z * (-log(x))^y )
// 0 < x < 1, y > 0, z > 0 
public static double f(double x, double y, double z)
{
    return Math.Exp(-z * Math.Pow(-Math.Log(x), y));
}

As this is something based on rather common functions, I was wondering : Are there some libraries (or better native C# ways) that could do it faster ?

Answer 1

Big Picture: No.

You might be able to find an implementation which compromises accuracy in favor of performance though (maybe using estimation and lookups).