clear all; close all; clc;
n = 8388608;
m = 4;
x0 = (0:n-1)+1i*(0:n-1);
while(n > 4)
x = x0(1:n);
fprintf('n = %12d ', n);
t0 = tic();
for k = 1:m
X = fft(x);
end
dt = toc(t0) / m;
fprintf('%12.6f\n', dt*1000);
n = n/2;
m = m*1.5;