# compio-rs/compio

A thread-per-core async Rust runtime with IOCP/io_uring/polling.

Repository: https://github.com/compio-rs/compio
Canonical: https://ross.abutalabs.com/products/compio
Homepage: https://compio.rs
Language: Rust
License: MIT
License Family: permissive
Last push: 2026-08-22T04:18:22+00:00

## Health v2 (maintenance only)
Score: 90/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 86, longevity 78
- inputs: {"age_days": 1101, "days_push": 11, "days_rel": 15, "gap_med": 62, "n_releases_24m": 12}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1850, forks 127 (observed 2026-08-28T04:05:44.226744+00:00)

## What it is
Compio is a thread-per-core asynchronous Rust runtime built on completion-based I/O, using io_uring on Linux, IOCP on Windows, and polling fallbacks elsewhere. It provides high-level async filesystem and networking APIs as well as low-level proactor driver access, inspired by monoio.

## Use cases
- build a high-performance async network server in Rust
- run async file I/O with io_uring on Linux
- write a thread-per-core Rust application without tokio
- use completion-based I/O with IOCP on Windows
- inspect async tasks with tokio-console in a non-tokio runtime
- replace monoio with an actively maintained alternative

## When to choose
- you want maximum I/O performance via io_uring or IOCP in Rust
- you prefer thread-per-core architecture over work-stealing runtimes
- you need async filesystem and networking APIs outside the tokio ecosystem

## When to avoid
- you need tokio's ecosystem compatibility and broad middleware support
- your target platforms lack io_uring/IOCP and polling fallback performance is insufficient
- you need a work-stealing multi-threaded scheduler

## Facets
- artifact type: library
- maturity: active
- function: concurrency, http-server, file-system, developer-tools
- domain: developer-tools, backend, performance, networking
- platform: rust, windows, cross-platform
- tags: async-runtime, io-uring, iocp, thread-per-core, completion-based-io, proactor, linux, macos

## Member repositories
- compio-rs/compio (main) score 90

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:44.226744+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 2026-08-30T03:16:57.179363+00:00, confidence not recorded.
  - readme: https://github.com/compio-rs/compio (fetched 2026-08-28T04:05:44.226744+00:00, sha 51b6a5574ca7)
  - homepage: https://compio.rs (fetched 2026-08-29T10:56:12.689162+00:00, sha 1cab23e0652e)
  - registry_crates: https://crates.io/api/v1/crates/compio (fetched 2026-08-29T10:56:12.698750+00:00, sha cafd549d9285)
- Data as of 2026-08-30T08:39:29.467469+00:00.