myscr.m

%% This script compares the execution times of 3 different approaches
%     Approach 1: From a dll
%     Approach 2: C-like M file
%     Approach 3: Vectorized version M file
%% Load the library from dll
loadlibrary conv.dll conv.h
calllib('conv','myconv')

%% Time call for dll, C-like m file and vectorized m file
clc
disp('Call to C DLL:');
tic; calllib('conv','myconv'); toc
disp('Call to C-like M file:');
tic; myconvm1; toc %Time call to C-like m file
disp('Call to vectorized M file:');
tic; myconvm2; toc %Time call to vectorized version