> For the complete documentation index, see [llms.txt](https://http3-explained.haxx.se/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://http3-explained.haxx.se/zh/quic/quic-0rtt.md).

# 0-RTT

先前已连接过一个服务器的客户端可能缓存来自该连接的某些参数，并在之后与该服务器建立一个无需等待握手完成就可以立即传输信息的**0-RTT**连接，从而减少建立新连接所必需的时间。
