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 23 files changed, +4872/-1559 lines