Optimizing Java Class Metadata in Project Valhalla
Posted on February 7, 2026
In this post, I’ll walk through some of the behind-the-scenes details of one of Project Valhalla’s core features: value classes, and the concept of flattening (or inlining, the term I will use here). Whether you’re a JVM developer or just deeply curious about how Java works under the hood, this technical deep dive is for you.
More at https://joelsiks.com/posts/valhalla-inlinelayoutinfo-array-optimization/