代码速度问题 about face-alignment-at-3000fps HOT 1 OPEN

//#pragma omp parallel for num_threads(2) private(w_ptr)
for (int i = 0; i < delta_shape.rows; i++) {
    w_ptr = weight.ptr<double>(2 * i);
    double y = 0;
    for (int j = 0; j < lbf.cols; j++) y += w_ptr[lbf_ptr[j]];
    delta_shape(i, 0) = y;

    w_ptr = weight.ptr<double>(2 * i + 1);
    y = 0;
    for (int j = 0; j < lbf.cols; j++) y += w_ptr[lbf_ptr[j]];
    delta_shape(i, 1) = y;
}
return delta_shape;