Top 7 C Coroutine Projects

libaco

2 3,388 10.0 C

A blazing fast and lightweight C asymmetric coroutine library 💎 ⛅🚀⛅🌞

Project mention: Splitting the stack - is there a library for this? | /r/C_Programming | 2023-05-17
swow

2 1,074 0.0 C

Coroutine-based cross-platform concurrent I/O engine.

Project mention: Running PHP with io_uring | /r/PHP | 2023-03-27
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libfiber

0 704 0.0 C

The high performance coroutine library for Linux/FreeBSD/MacOS/Windows, supporting select/poll/epoll/kqueue/iouring/iocp/windows GUI (by iqiyi)
minicoro

2 531 0.0 C

Single header stackful cross-platform coroutine library in pure C.

Project mention: How Much Memory Do You Need to Run 1M Concurrent Tasks? | news.ycombinator.com | 2023-05-21

It would be interesting to bench something extremely lightweight (like https://github.com/edubart/minicoro) against these runtimes.
By my back-of-the-napkin math, 1,000,000 coroutines would cost about 64mb + 2mb/core for stacks.. which works out to about 4x less memory than the 'winner' of this comparison, and ~30x less than go.
Melang

2 400 0.0 C

A script language of time-sharing scheduling coroutine in single thread

Project mention: User space dynamic tracing and feedback control | dev.to | 2023-02-03

In order to simplify the demonstration code, the above example does not show network communication and data storage at the script layer, but all these functions are supported by Melang scripts. Interested readers can refer to Melang official website.
lua-eco

1 51 0.0 C

🐛Lua-eco is a Lua interpreter with a built-in event loop for scheduling lightweight coroutines automatically, enabling efficient concurrency in Lua. Build high-performance, scalable applications.

Project mention: Lua-Eco | news.ycombinator.com | 2023-03-10
Medge

1 3 10.0 C

Medge is a new HTTP API server with preemptive scheduling co-routine programming language as its developing language.

Project mention: Step-sharing scheduling Coroutine HTTP Server | dev.to | 2023-09-01

This article introduces an open source API server named Medge. Medge is an HTTP server, and its authors currently position it as an API server.
InfluxDB

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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). The latest post mention was on 2023-09-01.