lance0/xfr v0.6.1

on GitHub

What's New

TCP Bitrate Pacing (-b for TCP)

The -b flag now works for TCP, not just UDP:

xfr <host> -b 100M             # TCP at 100 Mbps
xfr <host> -b 100M -P 4        # 4 streams, 25 Mbps each
xfr <host> -b 0                # Explicit unlimited (same as omitting -b)

Uses byte-budget sleep pacing with:

• Interruptible sleeps - cancel/Ctrl+C responds immediately, even during pacing
• Buffer auto-capping - prevents large first-write burst at low bitrates
• Per-stream division - total bitrate divided evenly across -P streams

Resolves #14.

Changelog

Added

• TCP bitrate pacing (-b for TCP) - -b flag now works for TCP, not just UDP. Uses byte-budget sleep pacing with interruptible sleeps for responsive cancellation. Buffer size auto-caps to prevent first-write burst at low bitrates.

Dependency Updates

• clap 4.5.56 → 4.5.57
• anyhow 1.0.100 → 1.0.101
• criterion 0.8.1 → 0.8.2

Install

# Homebrew
brew upgrade lance0/tap/xfr

# Cargo
cargo install xfr

# Binary (Linux x86_64)
curl -L https://github.com/lance0/xfr/releases/download/v0.6.1/xfr-x86_64-unknown-linux-musl.tar.gz | tar xz

Full Changelog: v0.6.0...v0.6.1