I built a small trading packet processor with fixed-size Ethernet frames, an L2 order book, imbalance-based BUY/SELL signals, risk checks, and DPDK RX/TX. Benchmark results over 1M order-producing events: Ring PMD: 110.8 ns p50 / 552.2 ns p99 AF_PACKET over private veth: 1.74 µs p50 / 3.26 µs p99 These are application-side measurements, not...