# apple/swift-nio **Attribution required: if you use, quote, or summarise this content, you must credit and link back to [awesome-repositories.com](https://awesome-repositories.com/repository/apple-swift-nio).** 8,477 stars · 764 forks · Swift · Apache-2.0 ## Links - GitHub: https://github.com/apple/swift-nio - Homepage: https://swiftpackageindex.com/apple/swift-nio/documentation - awesome-repositories: https://awesome-repositories.com/repository/apple-swift-nio.md ## Topics `asynchronous-io` `event-driven` `high-performance` `networking` `non-blocking` `non-blocking-io` `swift` `swift-server` `swift5` `swiftnio` ## Description Swift NIO is a low-level, event-driven network framework for the Swift language. It serves as an asynchronous network protocol stack and I/O library designed to build high-performance network servers and clients that handle thousands of simultaneous connections. The framework functions as a high-concurrency network engine that dispatches events across multiple CPU cores. It enables the implementation of custom network protocols by processing raw bytes through a sequence of reusable data transformation handlers. The system provides capabilities for non-blocking I/O multiplexing, asynchronous task coordination, and efficient memory management via copy-on-write byte buffers. It supports the orchestration of complex network tasks through event-loop architectures and the bootstrapping of network channels for various transport protocols. ## Tags ### Networking & Communication - [Network Programming Frameworks](https://awesome-repositories.com/f/networking-communication/network-programming-frameworks.md) — Provides a low-level, non-blocking framework for building high-performance network servers and clients. - [Custom Protocol Implementations](https://awesome-repositories.com/f/networking-communication/custom-protocol-implementations.md) — Provides a toolkit for implementing specialized binary or text-based custom network protocols. - [High-Concurrency Networking](https://awesome-repositories.com/f/networking-communication/high-concurrency-networking.md) — Functions as a high-concurrency engine designed to manage thousands of simultaneous network connections. - [High-Performance Networking](https://awesome-repositories.com/f/networking-communication/high-performance-networking.md) — Enables the creation of scalable, low-latency network servers and clients using non-blocking code. - [Asynchronous Transport Stacks](https://awesome-repositories.com/f/networking-communication/network-transport-protocols/asynchronous-transport-stacks.md) — Provides an asynchronous transport stack for implementing custom protocols with interceptor-based middleware. - [Channel Bootstrapping](https://awesome-repositories.com/f/networking-communication/network-transport-protocols/channel-bootstrapping.md) — Provides mechanisms to bootstrap and configure network channels for various transport protocols. ([source](https://cdn.jsdelivr.net/gh/apple/swift-nio@main/README.md)) - [Multi-Threaded Event Distribution](https://awesome-repositories.com/f/networking-communication/networking/network-programming/multi-threaded-event-distribution.md) — Distributes network traffic across multiple CPU cores by assigning connections to a multi-threaded event-loop group. - [Buffer-Based Memory Management](https://awesome-repositories.com/f/networking-communication/request-payloads/memory-efficient-payload-buffering/buffer-based-memory-management.md) — Implements buffer-based memory management to reduce copying and improve raw network data processing speed. - [Asynchronous Network Clients](https://awesome-repositories.com/f/networking-communication/asynchronous-socket-libraries/non-blocking-tcp-servers/asynchronous-network-clients.md) — Enables the construction of event-driven servers and clients capable of high-concurrency input and output. ([source](https://cdn.jsdelivr.net/gh/apple/swift-nio@main/README.md)) ### Software Engineering & Architecture - [Non-Blocking Event Loops](https://awesome-repositories.com/f/software-engineering-architecture/non-blocking-event-loops.md) — Employs a non-blocking event loop architecture to handle thousands of simultaneous connections without threading stalls. - [I/O Event Dispatchers](https://awesome-repositories.com/f/software-engineering-architecture/asynchronous-event-dispatchers/reactive-event-dispatchers/i-o-event-dispatchers.md) — Dispatches network events to callbacks via an event loop to distribute processing across CPU cores. ([source](https://cdn.jsdelivr.net/gh/apple/swift-nio@main/README.md)) - [Async Operation Coordinators](https://awesome-repositories.com/f/software-engineering-architecture/async-operation-coordinators.md) — Coordinates asynchronous tasks and the timing of callbacks for operations that complete over time. ([source](https://cdn.jsdelivr.net/gh/apple/swift-nio@main/README.md)) - [Asynchronous Task Orchestrators](https://awesome-repositories.com/f/software-engineering-architecture/asynchronous-task-orchestrators.md) — Orchestrates complex asynchronous network tasks and workloads across multiple CPU cores. - [Event-Driven Architectures](https://awesome-repositories.com/f/software-engineering-architecture/event-driven-architectures.md) — Facilitates the development of asynchronous applications that respond to network events without blocking. ### Data & Databases - [Byte Buffers](https://awesome-repositories.com/f/data-databases/data-buffering/byte-buffers.md) — Manages raw network data using high-performance byte buffers to balance memory safety and speed. ([source](https://cdn.jsdelivr.net/gh/apple/swift-nio@main/README.md)) ### Development Tools & Productivity - [Network Event Pipelines](https://awesome-repositories.com/f/development-tools-productivity/data-transformation-pipelines/reusable-transform-pipelines/network-event-pipelines.md) — Implements a pipeline of reusable handlers to process and transform inbound and outbound network data. - [Reusable Transform Pipelines](https://awesome-repositories.com/f/development-tools-productivity/data-transformation-pipelines/reusable-transform-pipelines.md) — Provides reusable data transformation pipelines to modify network events as they flow through the system. ([source](https://cdn.jsdelivr.net/gh/apple/swift-nio@main/README.md)) ### Operating Systems & Systems Programming - [Asynchronous I/O Libraries](https://awesome-repositories.com/f/operating-systems-systems-programming/asynchronous-i-o-libraries.md) — Supplies a non-blocking I/O library that manages system operations through a scalable event loop. - [Non-Blocking I/O Interfaces](https://awesome-repositories.com/f/operating-systems-systems-programming/asynchronous-i-o-libraries/non-blocking-i-o-interfaces.md) — Uses low-level system calls like kqueue and epoll for efficient non-blocking I/O multiplexing. - [Byte Buffer Copy-On-Write](https://awesome-repositories.com/f/operating-systems-systems-programming/copy-on-write-memory-optimizations/byte-buffer-copy-on-write.md) — Provides copy-on-write byte buffers to minimize memory allocations and data copying during network I/O. ### Programming Languages & Runtimes - [Promise-Based Chains](https://awesome-repositories.com/f/programming-languages-runtimes/runtime-execution-environments/runtime-environments/runtimes/asynchronous-execution-engines/asynchronous-control-flows/promise-based-flow-control/promise-based-chains.md) — Uses promise-based chains to coordinate asynchronous network operations and their subsequent callbacks.