The use of loop does not create any performance disadvantage. The bottleneck is the interpolation part. If your computer has large number of cores, >4, then you can utilize parfor pragma to parallelize your loop.
Tnew = zeros(length(Hnew),N);
parfor
for i-1:N
Tnew(:,i) = interp1(H(:,i),T(:,i),Hnew);
end
Please use the link below for more information
Hope that helps
