I have a simple algorithm which converts a bayer image channel (BGGR,RGGB,GBRG,GRBG) to rgb (demosaicing but without neighbors). In my implementation I have pre-set offset vectors which help me to translate the bayer channel index to its corresponding rgb channel indices. Only problem is I'm getting awful performance in debug mode with MSVC11. Under release, for an input of 3264X2540 size the function completes in ~60ms. For the same input in debug, the function completes in ~20,000ms. That's more than X300 difference and since some developers are runnig my application in debug, it's unacceptable.

My code:

void ConvertBayerToRgbImageDemosaic(int* BayerChannel, int* RgbChannel, int Width, int 

Height, ColorSpace ColorSpace)
{
    int rgbOffsets[4]; //translates color location in Bayer block to it's location in RGB block. So R->0, G->1, B->2
    std::vector<int> bayerToRgbOffsets[4]; //the offsets from every color in the Bayer block to (bayer) indices it will be copied to (R,B are copied to all indices, Gr to R and Gb to B).
    //calculate offsets according to color space
    switch (ColorSpace)
    {
    case ColorSpace::BGGR:
            /*
             B G
             G R
            */ 
        rgbOffsets[0] = 2; //B->0
        rgbOffsets[1] = 1; //G->1
        rgbOffsets[2] = 1; //G->1
        rgbOffsets[3] = 0; //R->0
        //B is copied to every pixel in it's block
        bayerToRgbOffsets[0].push_back(0);
        bayerToRgbOffsets[0].push_back(1);
        bayerToRgbOffsets[0].push_back(Width);
        bayerToRgbOffsets[0].push_back(Width + 1);
        //Gb is copied to it's neighbouring B
        bayerToRgbOffsets[1].push_back(-1);
        bayerToRgbOffsets[1].push_back(0);
        //GR is copied to it's neighbouring R
        bayerToRgbOffsets[2].push_back(0);
        bayerToRgbOffsets[2].push_back(1);
        //R is copied to every pixel in it's block
        bayerToRgbOffsets[3].push_back(-Width -
c++ performance visual-studio-2012
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