eclipse-openj9/openj9
Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo. observed · 2026-08-28
Health v2 · maintenance only
94/100
- Activity 99
- Release rhythm 83
- Longevity 100
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 47.5
- age_days: 3295
- days_rel: 34
- days_push: 7
- n_releases_24m: 13
Adoption not part of the score
3537 stars · 792 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Eclipse OpenJ9 is an independent, enterprise-grade Java Virtual Machine implementation for OpenJDK, built on Eclipse OMR. It is optimized for small memory footprint, fast startup, and high throughput.
Use cases
- run Java applications with lower memory footprint
- reduce JVM startup time for containers and serverless
- replace HotSpot with an alternative OpenJDK JVM
- tune garbage collection for high-throughput workloads
- contribute to or study JVM internals
When to choose
- memory or startup cost matters, e.g. containers, microservices, cloud
- you want an alternative JVM backed by Eclipse and IBM
- you need AOT compilation or OpenJ9-specific GC options
When to avoid
- you need maximum ecosystem compatibility and tooling tuned for HotSpot
- your team has no capacity to handle a less common runtime
- you rely on HotSpot-specific flags or JVM features
Facets
application · maturity active
interpreter compiler programming-languages performance developer-tools windows cross-platform jvm jvm java-virtual-machine openjdk jit-compiler garbage-collection eclipse-omr linux macos
1 source
- readme: https://github.com/eclipse-openj9/openj9 · fetched 2026-08-28 · daeb8e061b0a
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| eclipse-openj9/openj9 | main | 94 |
For agents
markdown · JSON · MCP: product_card(name="eclipse-openj9/openj9")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem