Top 11 Asynchronous Event Loop Open-Source Projects

libuv

75 23,219 9.1 C

Cross-platform asynchronous I/O

Project mention: Epoll: The API that powers the modern internet (2022) | news.ycombinator.com | 2024-01-11

libevent

12 10,728 8.7 C

Event notification library

Project mention: Epoll: The API that powers the modern internet (2022) | news.ycombinator.com | 2024-01-11

InfluxDB

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Boost.Asio

20 4,621 8.6 C++

Asio C++ Library

Project mention: How to synchronize access to application data in multithreaded asio? | /r/cpp | 2023-06-08

Indeed looks like it, strand_executor_service.hpp is using a Mutex internally (otherwise it wouldn't make sense to me).

uvw

1 1,767 7.6 C++

Header-only, event based, tiny and easy to use libuv wrapper in modern C++ - now available as also shared/static library!
libev

4 1,540 0.0 C

Full-featured high-performance event loop loosely modelled after libevent

Project mention: Polyphony: Fine-Grained Concurrency for Ruby | news.ycombinator.com | 2023-05-12

Thank you for this.
I am interested in how concurrency can be represented elegantly and efficiently, so I am interested in how libraries can simplify async and make it easier to reason about and write
The libev and ioring support is great for IO scalability (https://github.com/enki/libev not sure if this is the official repo)
In Python I use the "select" module and use epoll on Linux.
I am currently thinking of designing an API that allows the registration of epoll-like listeners to arbitrary objects, including business objects, so you can efficiently register a listener on multiple behaviours of multiple arbitrary objects.
I wrote an async/await simulation in Java and my scheduler is really simple, it's just a for loop that checks to see if there are any tasks that can progress. I notice the switch_fiber in polyphony must do something similar. This is similar to a yield in a coroutine.
My async/await simulation takes the following program:
  task1:

asyncio

3 764 3.4 C++

asyncio is a c++20 library to write concurrent code using the async/await syntax. (by netcan)
rotor

8 327 8.9 C++

Event loop friendly C++ actor micro-framework, supervisable
WorkOS

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Dasynq

0 165 5.6 C++

Thread-safe cross-platform event loop library in C++
packio

2 119 2.2 C++

An asynchronous msgpack-RPC and JSON-RPC library built on top of Boost.Asio.
zab

3 64 0.0 C++

C++20 liburing backed coroutine executor and event loop framework.
lev

0 48 0.0 C++

Lightweight C++ wrapper for LibEvent 2 API

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).