speedbump ☆

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Description:
TCP proxy for simulating variable, yet predictable network latency

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Networking

Tags: proxy networking testing latency development

Install: brew install speedbump

About:
Speedbump is a command-line TCP proxy that introduces configurable latency into network connections. It allows developers to simulate real-world network conditions like slow links or high ping with precise, predictable delay values. This helps in testing application resilience and user experience under adverse network scenarios without needing physical network manipulation.

Key Features:

Configurable, precise latency injection (fixed or random)
Low overhead and high performance
Support for TCP and UDP protocols
Simple command-line interface

Use Cases:

Testing mobile app performance on simulated 3G/4G networks
Debugging distributed systems with high-latency inter-service communication
Validating client-side timeouts and retry logic

Alternatives:

tc (Traffic Control) – Linux kernel utility for advanced traffic shaping; more complex to use than speedbump's simple proxy approach.
netem – Kernel-level network emulator; requires root privileges and specific OS support.
Toxiproxy – Broader chaos engineering tool for simulating various network faults (not just latency); heavier setup.

Version History

Detected	Version	Rev	Change	Commit
Sep 15, 2025 9:29am		0	VERSION_BUMP	c18a9e07
Sep 13, 2024 10:07pm		0	VERSION_BUMP	2d276db3