function duration = computeFFTDuration(x, fs, pad)
%%%%%%%%%%%%%%%%%%
%function duration = computeFFTDuration(x, fs, pad)
%
% Task: Determine the duration of a DFT/FFT
%
% Input:
%	- signal: the input signal to process
%	- fs: the sampling rate
%	- pad: boolean if true, signal is padded to the next power of 2 otherwise the dft is computed on the signal length
%
% Output: 
%	- duration: duration of the computation process for the DFT/FFT
%	
%
% Guillaume Gibert, guillaume.gibert@ecam.fr
% 27/04/2022
%%%%%%%%%%%%%%%%%%

n = length(x);  

if (pad)
	n = 2^nextpow2(n);
end

tic
	y = fft(x, n);
duration = toc;