fftw

C library for computing Fast Fourier Transform (FFT) operations

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C routines to compute the Discrete Fourier Transform

fftw-wisdom

Generate FFTW wisdom file for optimal FFT performance on your system$ fftw-wisdom -o ~/.fftw_wisdom

Benchmark FFTW performance for 1D complex-to-complex transforms of size 1024$ fftw-wisdom -x 1024 -c

Use FFTW library in C code by linking against it during compilation$ gcc -o my_fft my_fft.c -lfftw3 -lm