Surf these sites: FFT Links -- links to many sources of FFT code and information FFT Page -- links and various Fortran FFT implementations FFTW -- fast free C FFT library; includes multi-dimensional, real-complex, and parallel transforms. Fast Fourier Transforms -- Contains Fast Fourier Transform source code (C, C++, Pascal), tutorial, and math theory. Joerg''s -- source code and links for many different FFT implementations and related information. Notes on the FFT -- overview of FFT literature, with many references. benchFFT -- benchmark comparing speeds of many FFT codes. Results from many machines, and code to run it yourself.
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