Migrating to HTTP/3: First Impressions
March 15, 2026Recently, I've been experimenting with upgrading the core infrastructure of my side projects to support HTTP/3 (QUIC). The transition wasn't entirely smooth, especially when dealing with legacy reverse proxies.
The main challenge was configuring the UDP port forwarding correctly through the internal Docker network. QUIC requires port 443 to be open for both TCP and UDP. I've documented the docker-compose changes needed to make this work reliably.
Performance-wise, the initial handshake latency has dropped significantly for mobile clients connecting on unstable networks. I'll publish the full benchmark results next week once I collect more metrics.