# facebookexperimental/libunifex

Unified Executors

Repository: https://github.com/facebookexperimental/libunifex
Canonical: https://ross.abutalabs.com/products/libunifex
Language: C++
License: NOASSERTION
License Family: other
Last push: 2026-05-31T18:07:32+00:00

## Health v2 (maintenance only)
Score: 61/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 85, release rhythm 8, longevity 100
- inputs: {"age_days": 2500, "days_push": 94, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1713, forks 210 (observed 2026-08-28T04:05:25.922053+00:00)

## What it is
libunifex is a C++ library implementing the sender/receiver asynchronous programming model proposed for C++ standardization. It provides schedulers, timers, async I/O via io_uring, cancellation, async streams, and C++20 coroutine integration.

## Use cases
- write async C++ code with the sender/receiver model
- compose asynchronous operations with algorithms
- perform async file I/O on Linux with io_uring
- integrate coroutines with an executor framework
- implement structured concurrency with cancellation support
- prototype the future C++ std::execution API

## When to choose
- you need a modern, composable async/concurrency model in C++17/20
- you want to experiment with or adopt the proposed std::execution sender/receiver design
- you need structured cancellation and coroutine integration in C++

## When to avoid
- you need API or ABI stability in production
- you want a mature, widely-adopted async framework
- you need async I/O on platforms other than Linux io_uring or Windows thread pools

## Facets
- artifact type: library
- maturity: experimental
- function: concurrency, scheduling
- domain: developer-tools, performance
- platform: windows, cpp, cross-platform
- tags: sender-receiver, coroutines, io-uring, cancellation, executors, c-plus-plus, algorithms, linux, macos

## Member repositories
- facebookexperimental/libunifex (main) score 61

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:25.922053+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:34:42.246985+00:00, confidence not recorded.
  - readme: https://github.com/facebookexperimental/libunifex (fetched 2026-08-28T04:05:25.922053+00:00, sha d23443f51e50)
- Data as of 2026-08-30T08:39:29.467469+00:00.