fft_time.adb running 1.4GHz Athlon PC133 memory
N= 16 FFT      0.000013590
        inverse  0.000014380
        Both     0.000019690

N= 32 FFT      0.000021850
        inverse  0.000021900
        Both     0.000035900

N= 64 FFT      0.000037500
        inverse  0.000040700
        Both     0.000071800

N= 128 FFT      0.000084400
        inverse  0.000078200
        Both     0.000150000

N= 256 FFT      0.000164000
        inverse  0.000164000
        Both     0.000320500

N= 512 FFT      0.000375000
        inverse  0.000343000
        Both     0.000719000

N= 1024 FFT      0.000813000
        inverse  0.000750000
        Both     0.001562000

N= 2048 FFT      0.001750000
        inverse  0.001594000
        Both     0.003374000

N= 4096 FFT      0.003970000
        inverse  0.003406000
        Both     0.007250000

end fft_time