Performance Improvements of New Inline Types
Project Valhalla is one of the most interesting projects concerning the future of Java and of all JVM. It is still in an experimental state, but in this post, we will look at how to use it and implement a small program to verify possible performance improvements.
Valhalla's aim is to bring a new Inline Types (aka Value Types) that will: "Codes like a class works like an int."
Project Valhalla: A First Look at LW2 Inline Types
I summarized some recent Project ValhallaLW2 "inline types" progress that was made public recently in my blog post "Valhalla LW2 Progress - Inline Types." In this post, I illustrate some of the concepts summarized in that post with code examples executed against recently released Valhalla Early Access Build jdk-14-valhalla+1-8 (2019/7/4). All code examples featured in this post are available on GitHub.
The OpenJDK Wiki page "LW2" provides an illustrative example of inline types via source code for a class called "InlineType." My example makes some minor adaptions and additions to this class and is available on GitHub as a class called InlineTypeExample. Some items that stand out immediately when reviewing this source code are the presence of the keyword inline and the presence of the ? in the Comparable's generic parameter.