It seems like there is a bug in intel ipp 7.1 and 7.0 Compression function for x64. The color conversion function ippiBGRToYCbCr_JPEG_8u_C3P3R defined in ippj.dll is not working properly. Sometimes it stucks and gets slower. I tried 100 images to compress and almost 20% of the time this function retuns pretty slow. Although the colorconversion is done but the time taken is too slow than the normal for some images randomly. Moreover this function is working properly in 32 bit version. Also I tried my application by using the function ippiBGRToYCbCR_JPEG_8u_C4P3R with x64 and this one also work properly. But the newer function ippiBGRToYCbCr_JPEG_8u_C3P3R does not. Kindly check this and response me if there is nothing wrong in the function.