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- does MKL FFT use pre-calculated twiddle factor table or calculates the twiddle factor when doing FFT?

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Wei_Z_Intel

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02-24-2015
10:25 PM

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Hi,

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?

Thank you

John

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Evarist_F_Intel

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02-24-2015
10:59 PM

63 Views

Hi John,

MKL FFT precomputes twiddle factors during CommitDescriptor phase for minimizing overhead for DftiCompute function.

Wei_Z_Intel

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02-24-2015
11:04 PM

63 Views

Thanks a lot for the quick response.

John

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