Performance issues on different machines - c++

Question

I wrote a C++ program that uses opencv, I compiled it in VisualStudio 2010 using release mode as Win32 application, the opencv library is dynamically linked so I just copied the needed dll's to the root folder of the program(so I can run it on other computers), the program is tracking people in a video and works fine when I run it on my computer, however when I run it on other machines it works but 65% slower, at first I thought that its the machine it self that is slow, but then I wrote another small program(the code is below) whose only purpose is to read a video file and play it approximately at the original video speed. Unfortunately I have the same issue with it as well, it runs fine on my computer but when I run it on other computers it slows down by 65%(more or less), I am new to c++/opencv and I have no real idea why this is happening I'm hoping some one can enlighten me, was the dynamic linking a bad idea? and I should compile opencv as a static library(which I don't yet know how to do and will appreciate any help on the issue). or is it something else?
#include "opencv\cv.h"
#include "opencv\highgui.h"
int main(){
cv::VideoCapture vidBuffer;
if(!vidBuffer.open("res/test.mp4")){
std::cerr << "Cant find \"res/test.mp4\"\n";
system("pause");
return -1;
}
int fps = vidBuffer.get(CV_CAP_PROP_FPS);
int frameTime = 1000/fps;
//video loop
cv::Mat frame;
for(char c=-1;;c=cv::waitKey(frameTime)){
if(!vidBuffer.read(frame)||c==27)
break;
cv::imshow("Vidoe test", frame);
}
//loop emd
vidBuffer.release();
return 0;
}