Here are a few implementations in various languages. https://codegolf.stackexchange.com/questions/12420/too-fast-too-fourier-fft-code-golf https://codegolf.sta

Here are a few implementations in various languages. https://codegolf.stackexchange.com/questions/12420/too-fast-too-fourier-fft-code-golf https://codegolf.stackexchange.com/questions/12420/too-fast-...