---
title: quic.rtt.latest
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/client-connection/quic-rtt-latest
---

**Type:** INTEGER  
**Access:** read-only

**Available in:** recv, hash, deliver, log

The value, in milliseconds, of the latest round-trip time sample. Used for packet loss detection.