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I'm evaluating the MKL FFT performance, I have a quick question, does MKL FFT use pre-calculated twiddle factor table or calculate the twiddle factor parallely when doing FFT?
MKL FFT precomputes twiddle factors during CommitDescriptor phase for minimizing overhead for DftiCompute function.
Thanks a lot for the quick response.
For more complete information about compiler optimizations, see our Optimization Notice.