Polymarket DeFi dev says Rust rewrite Nex is up to 412x faster, targets mid-December launch

Polymarket DeFi's Rust rewrite Nex has been running in shadow mode on production traffic, mirroring every order for one week. The developer reports p99 place-order latency falling from 1.55s to 3.76ms (412x faster), full cancel-all from ~636ms-2.04s to 3.14ms, and capacity rising from 10k to 100k commands/s with 150k bursts. Startup drops from 5 mins to 15s. These are internal timings, not end-to-end. Nex keeps settlement onchain and makes no breaking changes to requests or responses, so MMs and builders need no rework. A Nex Sandbox is open for testing. Four weeks of shadow mode run first; go-live is targeted mid-December, with WebSocket improvements possibly sooner and further 5x latency work in Q1 next year.

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