A fast, modern network bandwidth testing tool with TUI. Built in Rust as an
iperf replacement.

Features:
 - Live TUI with real-time throughput graphs and per-stream stats
 - Server dashboard - xfr serve --tui for monitoring active tests
 - Multi-client server - handle multiple simultaneous tests
 - TCP and UDP with configurable bitrate and parallel streams
 - Bidirectional testing - measure upload and download simultaneously
 - Multiple output formats - plain text, JSON, JSON streaming, CSV
 - Result comparison - xfr diff to detect performance regressions
 - LAN discovery - find xfr servers with mDNS (xfr discover)
 - Prometheus metrics - export stats for monitoring dashboards
 - Config file - save defaults in ~/.config/xfr/config.toml
 - Environment variables - XFR_PORT, XFR_DURATION overrides

Homepage:
https://github.com/lance0/xfr/
