Boost.Beast

Algorithms are symmetric for clients and servers, enabling code reuse and flexibility in building both types of applications, as emphasized in the README's symmetry principle.

Built directly on Boost.Asio, providing a consistent asynchronous model that Asio users will find intuitive, reducing the learning curve for those already familiar with it.

As a header-only library, it simplifies integration into projects without requiring separate compilation or linking steps, making it easy to incorporate into existing build systems.

Designed to handle thousands of concurrent connections efficiently, leveraging Boost.Asio's non-blocking I/O for scalable networking applications, as stated in the performance claims.