Dynamic Threads for Scavenger GC

Background In order for Scavenger to find all live objects, it uses multiple threads and parallelizes the work as it traverses through the object trees. The number of working threads is dependent on the system: systems with more threads can use more threads to work on highly parallelized tasks. More information about this topic can…

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OpenJ9 VM Internship: Inline Types

My name is Adithya Venkatarao and I’m a 4th year Computer Science student from the University of Waterloo at the time of writing. After working in a variety of back-end and full-stack positions throughout my previous internships, I really wanted to further diversify my skillset by taking a dive down the tech-stack to work with…

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Developing with Appsody and OpenJ9 SCC

The cloud is becoming more and more essential in today’s world. And tools developers use to create cloud-native applications are improving everyday. But as a developer who has had no previous experience with the cloud or containers, there were a lot of hurdles I had to overcome: The complexity of the cloud toolchain available to…

Tomcat-Tradelite7 Performance of OpenJ9 with default Shared Cache

Tomcat is a very popular and widely used application server. In this article I will show how Tomcat users can get some good performance boosts by using the Eclipse OpenJ9 JVM. In different articles, we observed that OpenJDK8-OpenJ9 performed better with Startup and Footprint compared to OpenJDK8-HotSpot. Now with Shared Cache enabled by default with…

OpenJ9’s Advantage for Java Serialization

Did you know… that just by using OpenJ9 as your runtime, applications using deserialization could gain a huge performance advantage? Background Java serialization provides a way to easily convert a sequence of bytes to and from a java.lang.Object. One step that occurs during the process of deserialization is loading the class specified by the class…