Perfect Frame Lock

Detection approach

RequestAnimationFrame timing anomaly. Bots often lock to exact 16.67ms intervals (60fps) with zero jitter, unlike real browsers whose rAF timing fluctuates with OS scheduling.

How this helps detect bots

This signal is assessed with other independent session, browser, and network evidence. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.

Legitimate traffic to consider

High refresh rate monitors or browsers under hardware sync locks.