fft_time.adb running 266MHz Pentium II N= 16 FFT 0.000190870 inverse 0.000202300 Both 0.000221910 N= 32 FFT 0.000224800 inverse 0.000242350 Both 0.000296950 N= 64 FFT 0.000286400 inverse 0.000339500 Both 0.000454600 N= 128 FFT 0.000454600 inverse 0.000542800 Both 0.000825200 N= 256 FFT 0.000771000 inverse 0.001001500 Both 0.001602500 N= 512 FFT 0.001592000 inverse 0.001993000 Both 0.003415000 N= 1024 FFT 0.003195000 inverse 0.004075000 Both 0.007101000 N= 2048 FFT 0.007270000 inverse 0.008772000 Both 0.015864000 N= 4096 FFT 0.015262000 inverse 0.020288000 Both 0.035392000 end fft_time