What algorithm was used for function ippiDFTFwd_RToPack_32f_C1R?
And what is the algorithm complexity? like the method in FFTW?
I tried to increase the image size for the ippiDFTFwd_RToPack_32f_C1R, the execution time is not monotone increasing (of couse, 2^n is of the minimum execution time). Is there any theory analysis of the algorithm complexity for ippiDFTFwd_RToPack_32f_C1R? Many thanks!