# eclipse-omr/omr

Eclipse OMR™ Cross platform components for building reliable, high performance language runtimes

Repository: https://github.com/eclipse-omr/omr
Canonical: https://ross.abutalabs.com/products/omr
Homepage: http://www.eclipse.org/omr
Language: C++
License: NOASSERTION
License Family: other
Topics: hacktoberfest
Last push: 2026-09-02T21:33:12+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 81, longevity 100
- inputs: {"age_days": 3835, "days_push": 0, "days_rel": 51, "gap_med": 88, "n_releases_24m": 8}
- 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 1010, forks 430 (observed 2026-09-03T02:15:11.515343+00:00)

## What it is
Eclipse OMR is a set of open source C and C++ components for building robust, high-performance language runtimes across many hardware and OS platforms. It provides reusable building blocks including a garbage collector, JIT compiler technology, threading library, platform porting layer, and test framework, derived from IBM's J9 Java virtual machine.

## Use cases
- build a garbage collector for my language runtime
- add a JIT compiler to my interpreter
- cross-platform threading library for a VM
- reuse runtime components instead of writing my own GC
- port my language runtime to multiple operating systems
- build a custom virtual machine in C++

## When to choose
- you are building a language runtime or VM and want proven GC, JIT, and threading components
- you need enterprise-grade runtime technology with cross-platform support
- you want to avoid reimplementing OS interfaces, signal handling, and diagnostics for your language

## When to avoid
- you need a complete ready-to-use language runtime rather than components
- your project is not written in C or C++
- you only need a simple scripting language without managed memory or JIT

## Facets
- artifact type: library
- maturity: active
- function: compiler, concurrency, monitoring, testing, developer-tools
- domain: programming-languages, compilers, developer-tools, performance
- platform: windows, cpp, c, cross-platform
- tags: garbage-collection, jit-compiler, language-runtime, virtual-machine, threading, portability-layer, linux, macos

## Member repositories
- eclipse-omr/omr (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:11.515343+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 2026-08-30T07:11:49.957902+00:00, confidence not recorded.
  - readme: https://github.com/eclipse-omr/omr (fetched 2026-09-03T02:15:11.515343+00:00, sha dc2ad3a9d8d8)
  - homepage: http://www.eclipse.org/omr (fetched 2026-08-29T13:11:33.901176+00:00, sha e69edd1dce93)
  - site_page: https://eclipse.dev/omr/starter/whatisomr.html (fetched 2026-08-29T13:11:33.910303+00:00, sha 29ca216bd17e)
- Data as of 2026-08-30T08:39:29.467469+00:00.