QNet - QUIC Transport
Why QUIC over HTTP?
HTTP/TCP limitations in blockchain:
- 2-3 RTT handshake overhead per connection
- Head-of-line blocking: single lost packet blocks entire stream
- No native multiplexing: requires multiple connections
- TLS as separate layer adds latency
QUIC advantages:
- 0-RTT reconnection: critical for peer churn in P2P networks
- Stream multiplexing: parallel block/transaction propagation without blocking
- Connection migration: peers can change IP without reconnection
- Integrated TLS 1.3: encryption at protocol level
Industry adoption
Solana migrated to QUIC in 2022 for transaction ingress. Sui and Aptos use QUIC natively. Monad building on QUIC for high-throughput EVM. Performance-focused chains converge on this protocol.
Expected impact
Based on Solana's migration data:
- Handshake latency: ~60% reduction (3 RTT to 1 RTT)
- Block propagation: ~20-30% improvement due to multiplexing
- Connection stability: improved under network churn
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