Cloudflare has opened the code for Pingora, a toolkit for building network services

[or1k]

Pingora is designed for developing secure high-performance network services and programmable network systems in Rust. The framework is well tested and already used in the operation of high-loaded systems - a proxy built on its basis has been used in the Cloudflare content delivery network instead of nginx for more than a year and processes more than 40 million requests per second.

https://blog.cloudflare.com/pingora-open-source