The overall health of a peer-to-peer network may be inferred from statistics gathered and analyzed pertaining to individual node and node-to-node performance within the peer-to-peer network. When used with simulations for development or testing, the health statistic may be used instead of or to supplement standard regression testing to determine whether or not changes made improve system performance. When used with live peer-to-peer networks, the health statistic may provide a real-time view into network performance. Such a view may be used to adjust peer-to-peer network topology or to isolate underperforming or malicious nodes.