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Is it possible to speed up the overloaded matrix multiplication operator (*) in OpenCV by using preallocated cv::Mat instance with correct dimensions as a placeholder for where the result is being written into?

Something like the existing function:

CV_EXPORTS_W void gemm(InputArray src1, InputArray src2, double alpha,
                       InputArray src3, double beta, OutputArray dst, int flags = 0);

only simpler. I would like to have something like this:

CV_EXPORTS_W void matmul(InputArray src1, InputArray src2, OutputArray dst);

Is it possible to speed up the overloaded matrix multiplication operator (*) in OpenCV by using preallocated cv::Mat instance with correct dimensions as a placeholder for where the result is being written into?

Something like the existing function:

CV_EXPORTS_W void gemm(InputArray src1, InputArray src2, double alpha,
                       InputArray src3, double beta, OutputArray dst, int flags = 0);

only simpler. I would like to have something like this:

CV_EXPORTS_W void matmul(InputArray src1, InputArray src2, OutputArray dst);

Is it possible to speed up the overloaded matrix multiplication operator (*) in OpenCV by using preallocated cv::Mat instance with correct dimensions as a placeholder for where the result is being written into?

Something like the existing function:

CV_EXPORTS_W void gemm(InputArray src1, InputArray src2, double alpha,
                       InputArray src3, double beta, OutputArray dst, int flags = 0);

only simpler. I would like to have something like this:

CV_EXPORTS_W void matmul(InputArray src1, InputArray src2, OutputArray dst);

My concern is performance. Is it possible that

res = m1 * m2;
m2;

matmul(m1, m1, res) res)