iperf ☆

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Description:
Tool to measure maximum TCP and UDP bandwidth

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Networking

Tags: networking bandwidth benchmark iperf diagnostics

Install: brew install iperf

About:
Iperf is a classic tool for active network performance measurements. It creates data streams between a client and a server to measure TCP and UDP bandwidth, latency, and packet loss. It remains a standard for diagnosing network throughput issues and validating network capacity.

Key Features:

Measures maximum TCP/UDP bandwidth
Supports both client and server modes
Configurable port and buffer sizes
Reports bandwidth, jitter, and packet loss

Use Cases:

Benchmarking LAN and WAN throughput
Verifying Quality of Service (QoS) configurations
Troubleshooting slow file transfer speeds

Alternatives:

iperf3 – A newer, incompatible rewrite focused on a simpler codebase and better latency reporting.
nuttcp – An alternative with advanced features like traffic shaping and 64-bit counters.

Version History

Detected	Version	Rev	Change	Commit
Sep 12, 2025 3:29pm		0	VERSION_BUMP	e6fae8f4
Apr 11, 2024 12:12pm		0	VERSION_BUMP	1dfd59da