Udp

Our market data distribution problem was straightforward to state and hard to solve: deliver price updates to a dozen internal consumers with sub-500µs latency at 400,000 messages/second, with no head-of-line blocking between consumers. TCP broadcasting is serial — slow consumers stall fast ones. ZeroMQ was promising but showed GC pressure from its buffer management. Kafka was built for durability, not microsecond latency. When Martin Thompson and Todd Montgomery open-sourced Aeron in 2014, it solved almost exactly this problem. ...