developers.urbit.org/content/reference/glossary/behn.md

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Behn is the timing vane. It allows for applications to schedule events, which are managed in a simple priority queue. For example, Clay, the Urbit filesystem, uses Behn to keep track of time-specific file requests. Eyre, the Urbit web vane, uses Behn for timing-out HTTP sessions.

Behn is located in /base/sys/vane/behn.hoon within Arvo.

Further Reading

• The Behn tutorial: A technical guide to the Behn vane.