fft_time.adb running
N= 16 FFT      0.000004678
        inverse  0.000005224
        Both     0.000007882

N= 32 FFT      0.000008232
        inverse  0.000009526
        Both     0.000015753

N= 64 FFT      0.000016568
        inverse  0.000019348
        Both     0.000033930

N= 128 FFT      0.000036129
        inverse  0.000041679
        Both     0.000075801

N= 256 FFT      0.000079803
        inverse  0.000087404
        Both     0.000164927

N= 512 FFT      0.000175451
        inverse  0.000190267
        Both     0.000363582

N= 1024 FFT      0.000390868
        inverse  0.000418150
        Both     0.000805980

N= 2048 FFT      0.000888282
        inverse  0.000900010
        Both     0.001785904

N= 4096 FFT      0.001890108
        inverse  0.001835302
        Both     0.003726336

end fft_time