Polymarket opens Nex sandbox with 10x trading capacity planned

Polymarket has opened sandbox testing for Nex, a trading system rewritten in Rust that its engineering team says can handle 100,000 commands per second, ahead of a conditional mid-December launch. Nex targets 100,000 commands per second at launch, with capacity for short bursts of 150,000. Internal p99 order placement fell from 1.55 seconds to 3.76 milliseconds in company testing. Four weeks of shadow testing will precede deployment, while WebSocket improvements could arrive sooner. Existing requests and responses will remain compatible, according to Polymarket’s engineering announcement.