Write normal game-message and ACK packet framing directly into bounded stack spans, hash fragments without materialization, and send the populated slice to the socket. Preserve exact wire bytes and ISAAC failure ordering with differential and zero-allocation tests.
Decode headers, optional fields, fragments, and single-fragment messages directly over pooled datagrams. Copy only fragment state that crosses a datagram lifetime, preserve synchronous dispatch and ACK ordering, and lock the path to the owned decoder with differential and zero-allocation tests.
Replace timeout-polled in-world UDP receives with one cancellable caller-buffered socket operation. Transfer only right-sized pooled datagrams through the FIFO, return every ownership edge deterministically, and send caller spans without a transport copy while preserving handshake pacing and ACK order.
Replace over-cap full sorting with a retained exact top-k heap while preserving the accepted tie-order fallback. Differential tests lock randomized and Town Network-scale output, and the measured 463-light path cuts selector CPU by 29 percent without warmed allocations.
Reuse the PView frame input, publish mutation-invalidated landblock views, and avoid constructing optional shadow iterators while preserving title and lifecycle visibility facts.
