Optimized for the Cloud
for microservices and monoliths too!
Unleash the power of Java
Optimized to run Java™ applications cost-effectively in the cloud, Eclipse OpenJ9™ is a fast and efficient JVM that delivers power and performance when you need it most.
42% Faster Startup
over HotSpot
28% Faster Ramp-up
when deployed to cloud vs HotSpot
66% Smaller
when compared to HotSpot
Join the conversation
Join us on Slack where you can ask questions and chat directly with our developers. Whether you simply have a question about using OpenJ9, an idea for improvement, or a problem you want to discuss, we'd love to hear from you.
Join OpenJ9 slack
Like all great open source projects, we have a vibrant and busy GitHub repository where you can create issues to explore ideas, request new features, or report any difficulties you are having.
See OpenJ9 issues
Participate in the
Eclipse OpenJ9 project
Become a contributor
We welcome contributions to the project in all shapes and forms. If you are interested in JVM development, we'd love to hear your ideas and help you collaborate with us on the code base. There are other ways you can contribute too, such as working on our website and docs. Be a part of the project and share in our success!
Contributor GuideJoin community calls
Our regular calls are a great place to find out what is going on in the project. As well as discussing our release plans and development status, we often feature lightning talks by members of the community. For example, technical deep dives or overviews about new features. To see agendas and recordings, look in the Slack #planning channel.
Add to Calendar