How to benchchmark ue4 dedicated server?

Hi all, I’m doing some investigation about ue4 multiplayer networking. It’s effective to develop C/S game.
But I cannot find a nice solution to benchchmark server performence, including memory, cpu, io(network) etc. Some solutions come to my mind:

  1. UE4 editor, or commandline client,
    but maybe consume too much resource
    for one PC to test 100/200 players?
  2. Write an raw robot client to simulate ue4 networking protocol?

I cannot figure out a nice solution to test my server performence, and built in network profiler provided is no use here.
Can anyone help? Thanks in advance.