[Polymarket's New Trading System Nex Opens Sandbox Testing as P99 Order Latency Drops to 3.76 Milliseconds] According to Josh, the new trading system Nex, rewritten in Rust, has opened its sandbox testing phase. Over the past week, production orders have been mirrored in shadow mode to verify latency, load stability, and matching accuracy. It is not yet officially launched. Internal test data shows that the order latency P99 has decreased from 1.55 seconds in the existing Central Limit Order Book (CLOB) to 3.76 milliseconds. However, this metric does not represent end-to-end latency. The team plans to conduct four weeks of shadow testing, and if it runs smoothly, it is expected to launch in mid-December. WebSocket improvements may be released earlier.