fft_time.c          MAC quad G5 using one 2.5GHz PPC 
N=16 FFT time=5e-07 
     inv time=1e-06 
    both time=1e-06 

N=32 FFT time=2e-06 
     inv time=1e-06 
    both time=2e-06 

N=64 FFT time=2e-06 
     inv time=2e-06 
    both time=4e-06 

N=128 FFT time=5e-06 
     inv time=5e-06 
    both time=1e-05 

N=256 FFT time=0 
     inv time=2e-05 
    both time=2e-05 

N=512 FFT time=2e-05 
     inv time=2e-05 
    both time=4e-05 

N=1024 FFT time=5e-05 
     inv time=5e-05 
    both time=5e-05 

N=2048 FFT time=0.0001 
     inv time=0.0001 
    both time=0.0002 

N=4096 FFT time=0.0002 
     inv time=0.0002 
    both time=0.0004