Eclipse OpenJ9 – Open-source JVM • Hacker News Board

kodablah wrote: post #5

So is this OpenJDK-derived? If so, too bad, I've been hoping for a truly independent implementation. If not, does it pass the TCK?

This is IBM's formerly-proprietary J9 JVM, which I believe was developed entirely from scratch, independently of Sun's HotSpot JVM.

J9 actually has its roots in an earlier Smalltalk VM (VisualAge Smalltalk, I think). The source copyrights go back to 1991. Eclipse, of course, was what IBM started after abandoning VisualAge.

It's not a JDK/JRE. J9 must be combined with OpenJDK to be able to run apps.

Re: Eclipse OpenJ9 – Open-source JVM

#8

Post by nfa_backward » Sat, Sep 16, 2017, 6:54 PM UTC

crudbug wrote: post #6

Interesting news in Java world. Does this support AOT ?

http://www.eclipse.org/openj9/

"Shared classes and Ahead-of-Time (AOT) technologies typically provide a 20-40% reduction in start-up time while improving the overall ramp-up time of applications. This capability is crucial for short-running Java applications or for horizontal scalability solutions that rely on the frequent provisioning and deprovisioning of JVM instances to manage workloads."

Re: Eclipse OpenJ9 – Open-source JVM

#9

Post by notimetorelax » Sat, Sep 16, 2017, 7:00 PM UTC

The "Welcome to the Eclipse OpenJ9 repository" is just brilliant. So many product blogs and source code repositories fail to introduce the product first.

Re: Eclipse OpenJ9 – Open-source JVM

#10

Post by filereaper » Sat, Sep 16, 2017, 7:10 PM UTC

kodablah wrote: post #5

So is this OpenJDK-derived? If so, too bad, I've been hoping for a truly independent implementation. If not, does it pass the TCK?

Ex-J9 engineer here, J9 was built completely in a clean-room. It does pass the TCK tests.