Hello,
I am using MATLAB 2020b and I need to use resample function in some parts in my code. In MATLAB, resample function runs very fast, but when I convert it to cpp and run the code in Visual Studio 2015 with the same inputs, it gets slower.
For a sample code like this:
y = 1/(5e6):1/(5e6):1
tic
p = 8;
q = 5;
for i = 1:10
y1 = resample(y, p, q)
end
elapsed_time = toc;
The elapsed time is measured as 1.6 seconds in my computer. However, in Visual Studio, it is 10 seconds. The result y1 is same in both codes.
Actually, I might think that it is related to MATLAB Coder Generate settings, but my own resample code formed with the same configuration suprisingly outperforms the MATLAB function in cpp version, altough I use only loops for the calculations instead of vectorized operations (It is assumed to be very slow).
I want to mention that I could not convert MATLAB resample function to cpp in MATLAB 2019b. It gives an error like "coder.const could not reduce this expression to a constant". The solution proposed in the link below didn't work for me and I setup MATLAB 2020b.
Still, I believe that this happened because of my inexperience and I would appreciate if you can share your precious thoughts.
