ddidderr
d7f7dc737e
Configure the s2n-quic Tokio IO provider on both client and server instead of using the address-only default provider. The configured provider asks the OS for 4 MiB send and receive buffers on each QUIC UDP socket, which avoids starting bulk LAN transfers on the tiny default UDP buffer sizes. I tested a wider version that also raised s2n-quic internal IO queues to 8 MiB, but that regressed S37 to 710.19 and 736.20 MiB/s in repeat runs. This commit keeps the narrower socket-buffer request, which measured faster than the prior flow-control-only tuning while leaving the internal queue defaults intact. The host used for measurement reports: - net.core.rmem_max = 16777216 - net.core.wmem_max = 16777216 - net.core.rmem_default = 212992 - net.core.wmem_default = 212992 S37 single-source throughput: - Step 1: 824.94 MiB/s, 6920.09 Mbit/s, 2.483s - Step 2 sample A: 848.15 MiB/s, 7114.81 Mbit/s, 2.415s - Step 2 sample B: 874.06 MiB/s, 7332.12 Mbit/s, 2.343s Test Plan: - just fmt - sysctl net.core.rmem_max net.core.wmem_max net.core.rmem_default \ net.core.wmem_default - python3 crates/lanspread-peer-cli/scripts/run_extended_scenarios.py S37 --build-image - python3 crates/lanspread-peer-cli/scripts/run_extended_scenarios.py S37 Refs: local LAN download performance investigation on 2026-05-20. Depends-on: cd8bcbfeedfa (QUIC flow-control and BBR tuning).
lanspread
Description
Peer-to-peer game library sharing for LAN parties.
- Peers let users browse and download games from each other
- they discover each other on the local network via mDNS
- they exchange library metadata over QUIC
Ships as a Tauri desktop app.
Development
Prerequisites
# install Tauri CLI
cargo install tauri-cli
# install Deno with a package manager or from https://deno.land/
Build or Run
# build
just build
# run
just run
# test
just test
Scripted peer harness
crates/lanspread-peer-cli runs the peer runtime without the GUI and speaks
JSONL on stdin/stdout. It is intended for automated multi-peer smoke tests.
just peer-cli-build
just peer-cli-image
just peer-cli-run alpha