Polymarket Engineering Vice President Josh Stevens said its Rust-based Nex matching engine logged a 3.76-millisecond p99 order-latency reading in internal tests, versus 1.55 seconds on the existing system.
Stevens put Nex's p99 cancel latency at 3.20 milliseconds, compared with 627.92 milliseconds previously. Its p99 WebSocket write latency was 0.099 milliseconds, against an earlier range of 44.5 to 88.1 milliseconds.
Stevens said Nex has operated in shadow mode alongside Polymarket's production system for a week. Four additional weeks are planned, with a mid-December launch possible if testing goes well.
