# LuaJIT/LuaJIT

Mirror of the LuaJIT git repository

Repository: https://github.com/LuaJIT/LuaJIT
Canonical: https://ross.abutalabs.com/products/luajit
Homepage: http://luajit.org
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-19T18:59:33+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 35, longevity 100
- inputs: {"age_days": 4045, "days_push": 14, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5740, forks 1177 (observed 2026-08-28T04:09:28.372301+00:00)

## What it is
LuaJIT is a Just-In-Time (JIT) compiler for the Lua programming language, offering a high-performance interpreter and trace compiler. It includes an FFI library for calling C code, a profiler, and DynASM for code generation.

## Use cases
- speed up Lua scripts with JIT compilation
- embed a fast Lua runtime in a C application
- call C libraries from Lua without bindings via FFI
- profile and optimize Lua code performance
- generate machine code dynamically with DynASM

## When to choose
- you need a very fast Lua interpreter for games, servers, or embedded scripting
- you want low-overhead FFI to C libraries
- you need a small, portable scripting VM across POSIX and Windows

## When to avoid
- you need full Lua 5.3/5.4 language features
- you require a pure-JavaScript or sandboxed environment
- you need a license other than MIT for strict compliance review

## Facets
- artifact type: library
- maturity: stable
- function: compiler, interpreter, programming-language
- domain: programming-languages, compilers, performance, developer-tools
- platform: windows, bsd, cross-platform, cpp, c
- tags: jit-compiler, lua, ffi, trace-compilation, scripting-language, linux, macos

## Member repositories
- LuaJIT/LuaJIT (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:28.372301+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 2026-08-29T17:53:21.172502+00:00, confidence not recorded.
  - readme: https://github.com/LuaJIT/LuaJIT (fetched 2026-08-28T04:09:28.372301+00:00, sha 6c09c8668f29)
  - homepage: http://luajit.org (fetched 2026-08-29T08:48:46.227192+00:00, sha f72571e86646)
  - site_page: http://luajit.org/install.html (fetched 2026-08-29T08:48:46.247158+00:00, sha 16cab05a9f15)
  - site_page: http://luajit.org/faq.html (fetched 2026-08-29T08:48:46.249761+00:00, sha 9f07828af371)
- Data as of 2026-08-30T08:39:29.467469+00:00.