iPerf2 vs Netperf

iPerf2 measures network traffic performance, including throughput, latency, link capacity, and responsiveness. Testing uses a client to send traffic to a server. It can generate TCP and UDP traffic in one-way, bidirectional, full-duplex, and simultaneous multi-stream configurations. Measurements include one-way delay, round-trip time, jitter, packet loss, and throughput. It supports IPv4, IPv6, and multicast, including source-specific multicast joins, and reports can include enhanced metrics or use CSV format. The project manual describes an Android client with live meters for throughput, latency, and congestion signals. The manual also describes permit-key HMAC authentication using a timestamped HMAC-SHA256 value, with replay limited by a configurable time window. Its Professional feature set includes server access gating and remotely enabled server-side latency histograms. Measurements happen at socket-level reads and writes, so lower-level protocol-header overhead is excluded. iPerf2 and iPerf3 are separate implementations and do not interoperate. It runs on Android, Linux, macOS, and Windows, and can be self-hosted. Both listed editions are free.

Netperf is an open-source, self-hosted utility for measuring network performance. It reports unidirectional throughput and end-to-end latency through a client-server arrangement: netperf runs tests and netserver supplies the server side. Netserver can run as an inetd child or standalone daemon. The manual describes TCP and UDP transfer and request/response tests over IPv4 and IPv6 sockets, plus XTI, DLPI, Unix domain socket, and SCTP tests. Where the platform and build support it, results can include CPU utilization and service demand. Optional configuration enables STREAM pacing, timing histograms, and interim results. The primary distribution is source code, intended for systems without readily available binaries. Reported Windows builds use Cygwin, the Windows DDK, or Microsoft Visual Studio 2003; the README discusses an OSX naming workaround. Hewlett Packard Enterprise released this version under the MIT license. The project warns that its manual may be outdated, and several test families require explicit configuration.