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I am migrating from the MKLFFT calls to the MKL DFT calls using C++. I have a fft size that is 700K long that requires me to use a fft length of 2^20th. With the DFT call in MKL vs the FFT call will I see a 25% speed increase because I can use the 700K sample fft in the DFT instead of the 2^20th for the MKL FFT?
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