Bringing HTTP/3 To gRPC at Cloudflare Scale

on YouTube ↗30m

" summary

Cloudflare describes multi‑year work to run gRPC over HTTP/3 at edge scale, shipping early HTTP/3 support in 2018, open sourcing the quiche Rust library in 2019 and the testing tool h3i in 2024. Implementation uses a gRPC‑Web conversion layer to bridge a legacy proxy chain, required H2 mitigations (ping‑flood, rapid‑reset), and added H3 backends. Lab tests show ~1 RTT median savings and P90 cases up to ~5 RTTs; customer P75/P95 latency and success rates improve with H3.

AI-written summary · about

" chapters (9)

1. 0:00Introduction
2. 3:57HTTP/3 and gRPC at scale
3. 10:17QUIC and HTTP/3 timeline
4. 12:43Cloudflare’s QUIC/HTTP/3 implementation
5. 15:32gRPC HTTP/2 support at Cloudflare
6. 17:40HTTP/2 problems vs HTTP/3
7. 19:26gRPC over HTTP/3 support & gains
8. 26:08gRPC over HTTP/3 latency results
9. 28:15QUIC streams future

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