Haskell与C ++中的简单π（x）

I'm learning Haskell. My interest is to use it for personal computer experimentation. Right now, I'm trying to see how fast Haskell can get. Many claim parity with C(++), and if that is true, I would be very happy (I should note that I will be using Haskell whether or not it's fast, but fast is still a good thing). I'm learning Haskell. My interest is to use it