FFTW vs. OpenCV cvDFT

Question

Can I expect a speedup when using FFTW (http://www.fftw.org/) instead of OpenCV\'s cvDFT (http://goo.gl/YCHj0)?

My program\'s runtime is heavily determined by the applic

Answer 1

A more up to date and pretty well done comparison between several FFT options, there are pretty fast and free options:

https://github.com/project-gemmi/benchmarking-fft