Node2Vec:About the return_weight and neighbor_weight

Dear author,
    I read the source code of the Node2vec, and found that the default value of  return_weight and neighbor_weight is equal to 1,  Isn't that deepwalk？ 
    However, if I change the value of the return_weight and neighbor_weight, then the speed will be very slow，I want to customize the embedding of BFS and DFS, how to keep it fast？