Proposal: Output should push to different servers in parallel

I experienced a slowdown in Git pushing when I push to more than one server.

I propose:

Run push to several servers in parallel.

Not to mix the output, nevertheless serialize the output, that is for example cache the output of the second server push and start to output it immediately after the first server push is finished.

This approach combines the advantages of the current way (I suppose it is so) to serialize pushes: first push to the first server, then to the second, etc. and of my idea to push in parallel.

I think the best way would be use multithreading, but multiprocessing would be a good quick solution.