# MagicStack/uvloop

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11,817 stars · 609 forks · Cython · Apache-2.0

## Links

- GitHub: https://github.com/MagicStack/uvloop
- awesome-repositories: https://awesome-repositories.com/repository/magicstack-uvloop.md

## Topics

`async` `async-await` `async-python` `asyncio` `event-loop` `high-performance` `libuv` `networking` `python` `python-3`

## Description

uvloop is a high-performance replacement for the standard Python event loop. It functions as a drop-in substitute designed to accelerate asynchronous networking tasks and reduce latency in event-driven software systems.

The project achieves its performance characteristics by utilizing a Cython-based extension module that wraps the libuv C library. By leveraging low-level system calls for event-driven input and output multiplexing, it manages concurrent network requests and subprocess execution with minimal overhead.

The implementation supports scalable backend service development by handling large volumes of simultaneous connections and data streams. It incorporates zero-copy buffer management to minimize memory overhead during data transfer between the network stack and the application layer.

## Tags

### Development Tools & Productivity

- [Event Loop Replacements](https://awesome-repositories.com/f/development-tools-productivity/event-loop-integrations/event-loop-replacements.md) — Functions as a high-performance, drop-in replacement for the standard Python event loop.
- [Extension Compilers](https://awesome-repositories.com/f/development-tools-productivity/extension-compilers.md) — Compiles performance-critical logic into binary extension modules to bypass interpreter overhead.

### Networking & Communication

- [High-Performance Networking](https://awesome-repositories.com/f/networking-communication/high-performance-networking.md) — Accelerates network-heavy applications by replacing the standard event loop with a high-performance implementation.
- [Networking Libraries](https://awesome-repositories.com/f/networking-communication/networking-libraries.md) — Acts as a drop-in networking library replacement that leverages low-level system calls for improved speed.
- [Asynchronous Network Frameworks](https://awesome-repositories.com/f/networking-communication/asynchronous-network-frameworks.md) — Provides a foundational library for building event-driven network servers and clients. ([source](http://uvloop.readthedocs.org/))

### Programming Languages & Runtimes

- [Asynchronous Event Loops](https://awesome-repositories.com/f/programming-languages-runtimes/language-features-paradigms/concurrency-models/asynchronous-event-loops.md) — Optimizes asynchronous event loop execution to increase speed and reduce latency in network-heavy applications. ([source](http://uvloop.readthedocs.org/))
- [Event Loop Backends](https://awesome-repositories.com/f/programming-languages-runtimes/language-features-paradigms/concurrency-models/asynchronous-event-loops/event-loop-backends.md) — Wraps high-performance C libraries to provide the underlying engine for asynchronous I/O operations.

### Software Engineering & Architecture

- [Asynchronous Task Managers](https://awesome-repositories.com/f/software-engineering-architecture/asynchronous-task-managers.md) — Coordinates concurrent background operations and non-blocking task execution within a single-threaded event loop.
- [Zero-Copy Buffers](https://awesome-repositories.com/f/software-engineering-architecture/zero-copy-buffers.md) — Minimizes memory overhead by reusing buffers for high-concurrency network data structures.
- [Asynchronous Task Execution](https://awesome-repositories.com/f/software-engineering-architecture/concurrency-models/asynchronous-task-execution.md) — Provides mechanisms for executing non-blocking background network requests and subprocesses.

### System Administration & Monitoring

- [Event-Driven I/O](https://awesome-repositories.com/f/system-administration-monitoring/administrative-operations/linux-system-administration/networking/connection-lifecycle-management/parallel-network-i-o/event-driven-i-o.md) — Utilizes event notification loops to handle high-concurrency network connections without blocking the main thread.

### Web Development

- [High-Concurrency Backends](https://awesome-repositories.com/f/web-development/high-concurrency-backends.md) — Supports building high-concurrency backend services that handle large volumes of simultaneous connections.