Use CPU(KL) to run FFT of Intel IPP takes longer than CPU(HL)

Use CPU(KL) to run FFT of Intel IPP takes longer than CPU(HL)

Customer uses related Fast Fourier Transform(FFT) part of Intel Integrated Performance Primitives(IPP) to get calculated result (Please refer attached file).
Why use a new generation of CPU (Kaby Lake)) to run FFT of Intel IPP will takes longer than the previous generation of CPU (Haswell)? Could you expain this phenomenon? Thanks.

 

 

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For more complete information about compiler optimizations, see our Optimization Notice.

Thank you for reaching out to us. Can you please share some sample code to investigate this issue on our side?

Could you tell in detail what kind of some sample code sharing with you?

Any sample code which is shareable and can reproduce Fast Fourier Transform(FFT) performance issue observed at your end. 

Our AE keeps on asking customer's sharing sample code quickly. 

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