update with FFT duration code

computeFFTDuration.m

@@ -0,0 +1,28 @@
+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;