Actix is a high-performance, actor-based application framework for building highly concurrent and scalable applications in Rust. It is inspired by the Actor model, which allows for message-passing concurrency between independent and isolated actors, enabling highly parallelized and efficient processing of requests.

Actix is built on top of the Tokio asynchronous runtime and provides an abstraction layer for building highly concurrent network services, such as web servers, chat applications, and other real-time communication services. The framework is designed to be modular, with many independent components that can be used together or separately depending on the requirements of the application.

Actix features include:

- Efficient and highly concurrent handling of HTTP requests with a minimal overhead
- Built-in support for WebSockets and other real-time communication protocols
- A flexible middleware system that allows for adding common functionality to requests, such as authentication or compression
- A powerful actor system that enables message-passing between concurrent actors and isolation of state
- A sophisticated system for handling errors and faults, including timeouts and retries
- Flexible configuration options and support for both synchronous and asynchronous handlers.

Overall, Actix provides a powerful and efficient way to build highly concurrent and scalable applications in Rust.
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