# fibjs/fibjs

JavaScript on Fiber (built on Chrome's V8 JavaScript engine)

Repository: https://github.com/fibjs/fibjs
Canonical: https://ross.abutalabs.com/products/fibjs
Homepage: https://fibjs.org
Language: C++
License: NOASSERTION
License Family: other
Topics: javascript, v8, fiber, coroutine
Last push: 2026-08-22T06:58:49+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 4501, "days_push": 11, "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 3098, forks 302 (observed 2026-08-28T04:07:43.463270+00:00)

## What it is
fibjs is a JavaScript runtime built on Chrome's V8 engine that uses fiber-based coroutines with a synchronous, non-blocking IO model. It ships with a rich set of built-in C++ modules (HTTP server, databases, crypto, SSL, WebSocket, GUI) so developers can build high-performance web services without dealing with async callbacks.

## Use cases
- build a high-performance web server in JavaScript without async callbacks
- run JavaScript with synchronous-style non-blocking IO
- write scalable backend services using fibers and coroutines
- use a JavaScript runtime with built-in database, Redis, and SQLite support
- develop web apps with an npm-compatible JavaScript runtime alternative to Node.js
- serve HTTPS with built-in SSL and X509 certificate handling

## When to choose
- you prefer synchronous code style but need non-blocking IO performance
- you want batteries-included modules (HTTP, DB, crypto, WebSocket) without installing packages
- you need a lightweight, C++-core JavaScript runtime for server-side work

## When to avoid
- you need the Node.js ecosystem's full library compatibility and tooling
- your team relies heavily on async/await patterns and modern Node APIs
- you need guaranteed permissive licensing (license is non-standard)

## Facets
- artifact type: framework
- maturity: active
- function: web-framework, http-server, concurrency, cli, database-driver, caching, websocket, rpc, testing
- domain: web-development, backend, developer-tools, programming-languages, databases, networking
- platform: windows, cross-platform, cli
- tags: javascript-runtime, v8, fibers, coroutines, sync-style-io, npm-compatible, high-performance-server, linux, macos

## Member repositories
- fibjs/fibjs (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:43.463270+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 2026-08-29T18:46:22.112949+00:00, confidence not recorded.
  - readme: https://github.com/fibjs/fibjs (fetched 2026-08-28T04:07:43.463270+00:00, sha 6a2ffeaf3ba9)
  - homepage: https://fibjs.org (fetched 2026-08-29T09:42:24.499612+00:00, sha 3fc936b9ae60)
  - site_page: https://fibjs.org/docs/guide/readme.md.html (fetched 2026-08-29T09:42:24.502056+00:00, sha 8a9d0e99e5aa)
  - site_page: https://fibjs.org/docs/manual/module/readme.md.html (fetched 2026-08-29T09:42:24.504054+00:00, sha 71fd7fe9b833)
  - site_page: https://fibjs.org/docs/manual/object/readme.md.html (fetched 2026-08-29T09:42:24.506123+00:00, sha 931f80ce03cc)
  - site_page: https://fibjs.org/docs/awesome/readme.md.html (fetched 2026-08-29T09:42:24.508167+00:00, sha c827576a442e)
  - site_page: https://fibjs.org/docs/guide/about.md.html (fetched 2026-08-29T09:42:24.509968+00:00, sha cb59670c7874)
- Data as of 2026-08-30T08:39:29.467469+00:00.