xfr

name	xfr
description	Use this skill when the user wants to test network bandwidth, benchmark connections, compare network performance results, or measure throughput with a live TUI.

Xfr Plugin

A modern iperf3 alternative with a live TUI, multi-client server, and QUIC support. Built in Rust.

Commands

Server

• xfr serve start — Start xfr server for bandwidth testing

Client Testing

• xfr client test — Run bandwidth test to xfr server

Result Comparison

• xfr diff compare — Compare two bandwidth test results

LAN Discovery

• xfr discover find — Find xfr servers on LAN via mDNS

Usage Examples

Start server:

xfr serve
xfr serve -p 9000
xfr serve --tui
xfr serve --prometheus 9090

Run bandwidth test:

xfr 192.168.1.1
xfr 192.168.1.1 -t 30s -b 100M
xfr 192.168.1.1 -P 4 -R
xfr 192.168.1.1 -u -b 1G
xfr 192.168.1.1 --quic -P 4

Output formats:

xfr 192.168.1.1 --json -o results.json
xfr 192.168.1.1 --csv -o results.csv

Compare results:

xfr diff baseline.json current.json
xfr diff before.json after.json --threshold 5

Discover servers:

xfr discover

Installation

cargo install xfr

Or via package manager:

brew install lance0/tap/xfr
eget lance0/xfr

Key Features

• Live TUI with real-time throughput graphs
• Multi-client server (vs iperf3 single client)
• TCP, UDP, QUIC, and MPTCP support
• Parallel streams for bonded connections
• Multiple output formats (text, JSON, CSV)
• Result comparison with xfr diff
• LAN discovery via mDNS
• Prometheus metrics export
• 11 built-in color themes
• Firewall-friendly single-port mode