The original title is: "Execution Latency in My Polymarket Trading Bot - Sub-Second Trade Execution System Design"

Short summary

A developer shares lessons from building a Polymarket trading bot that has placed 11,717 trades, breaking down execution latency across four stages: signal generation (50-200ms), order signing (10-50ms), CLOB API submission (100-400ms), and on-chain confirmation (1-3s). The key insight is that on-chain confirmation on Polygon is the uncontrollable bottleneck, so the system is designed around a T-90 second cutoff before market resolution to buffer against worst-case latency. The bot uses limit orders exclusively, pre-builds order templates, maintains persistent API connections, and tracks signal-to-confirmation times via Telegram alerts as a latency monitoring mechanism.

• •Execution latency on Polymarket is dominated by on-chain confirmation (1-3s on Polygon), not client-side processing
• •System uses a T-90 second pre-resolution cutoff as an execution reliability buffer, not a signal quality decision
• •Limit orders at mid-price avoid spread slippage that would erase thin edges on binary prediction markets

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