Stefan Johansson’s Blog Garbage Collection, OpenJDK and Java
A blog about Garbage Collection, OpenJDK and Java.
Oracle is proud to announce the general availability of JDK 21. This release is the 12th Feature Release delivered on time through the six-month release cadence. This level of predictability allows developers to easily manage their adoption of innov…
A blog about Garbage Collection, OpenJDK and Java.
A few years ago the developers of Hazelcast Jet decided to try out the different GC alternatives available at the time. The result was this blog-series from 2020 and the results for ZGC looked very promising. Three years have passed since then and a lot more work has gone into ZGC. It became production ready in JDK 15, concurrent stack scanning was added in JDK 16 and now, in JDK 21, generational support has been added making it even more suitable for low latency workloads. In this post we look at one of the Hazelcast Jet experiments and see how Generational ZGC performs.
A couple of years ago I wrote a post about the GC progress between JDK 8 and JDK 17 for our three main GCs. With the JDK 21 release this fall, we now have a new LTS release to benchmark and generate some GC performance charts for. JDK 21 and the other releases since JDK 17 have delivered a set of noteworthy features such as Virtual Threads, Pattern Matching for switch and Generational ZGC. Let’s see how it performs.