today I try the opencv 2.31
if I use debug vesion

<pre><code class="cpp"> @
#pragma comment(lib, "opencv_core231d.lib")
#pragma comment(lib, "opencv_highgui231d.lib")
#pragma comment(lib,"opencv_imgproc231d.lib")
//#pragma comment(lib, "opencv_flann230.lib")
#pragma comment(lib,"opencv_video231d.lib")
//#pragma warning(disable : 4819)

#include "cv.h"
#include "highgui.h"
</code></pre>

@cvGoodFeaturesToTrack@ @
cvGoodFeaturesToTrack cost about 50ms

if I use the release version

<pre><code class="cpp">
@
#pragma comment(lib, "opencv_core231.lib")
#pragma comment(lib, "opencv_highgui231.lib")
#pragma comment(lib,"opencv_imgproc231.lib")
//#pragma comment(lib, "opencv_flann230.lib")
#pragma comment(lib,"opencv_video231.lib")
//#pragma warning(disable : 4819)

#include "cv.h"
#include "highgui.h"
</code></pre>

@cvGoodFeaturesToTrack@ @
cvGoodFeaturesToTrack cost about 80ms

Is it a bug ？？？