Polymarket to Open New Rust CLOB to Market Makers in November

This is a rare case of a major prediction market publicly conceding that its core matching engine is the bottleneck, and rebuilding it in Rust rather than patching around it. The staged rollout — test lifecycle, mirrored production traffic, market-maker access, two rehearsals — signals the risk of disrupting liquidity providers, whose quotes are Polymarket's lifeblood. The open question is whether mirroring production traffic surfaces enough edge cases before the switch, and whether market makers, given early access, become allies or critics of the migration.