Experience Baudrun, by Will Lehnertz, a command-line utility that simulates terminal output over slow serial links to test display timing and behavior. It throttles a command's standard output to a selected baud rate, producing character-by-character delays and supporting common and custom speeds. The tool wraps any CLI program, needs no elevated privileges, and runs as a standalone Go executable. Developers and embedded engineers gain a software-only way to validate TUIs and locate display tearing without physical serial hardware.

What the tool actually does for terminal testing

Baudrun limits stdout to a target bits-per-second rate,

Does it affect desktop performance during a simulation?

System impact is minimal by design.

Is it safe to run on production or developer machines?

Safety relies on inspection and user context.

Do you need technical skill to operate it correctly?

Basic command-line familiarity is sufficient.

Practical, software-first testing with a clear hardware limitation

Baudrun is a practical option for developers and embedded engineers who need software-only validation of terminal timing and visual behavior; its main caveat is that character-level throttling simulates transmission timing but does not reproduce electrical-layer or hardware handshake nuances. Use the tool for early-stage TUI debugging and regression checks, and complement it with real serial hardware when final validation requires physical-layer fidelity.