7 releases

0.2.7 Sep 11, 2023
0.2.6 Aug 27, 2023
0.2.4 Feb 4, 2023
0.2.3 Mar 20, 2022
0.1.3 May 28, 2020

#1660 in Network programming





A network (TCP-only) performance measurement tool written in Rust, inspired by iperf3's original code.

All basic features are implemented. Key differences from iperf3:

  • Uses a different control protocol (not compatible with iperf3's servers or clients)
  • Multi-threaded, parallel streams (-P) will be executed on different threads.
  • Design simulates realworld server/client applications in terms of work scheduling.


cargo install --locked netperf


On one node you run netperf in server mode:

netperf -s

On a client node, you need to connect to that server (you will need an addressable IP address IPv6 is supported).

netperf -c ::1

By default, the test will use a single stream (client sends and server receives). You can control the number of parallel streams with -P and the direction of traffic with -R/--bidir

Current Limitations

  • Does not support configuring MSS, Congestion control algorithm.
  • No UDP/STCP support.
  • Does not collect extra stats like retransmits, cwnd, etc. (contributions are appreciated)


Licensed under either of Apache License, Version 2.0 or MIT license at your option. Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.


~305K SLoC