Java 27 - when preview is inevitable

Brno Java User Group (BrnoJUG)
Speaker: Jiří Vaněk

Abstract:

JDK 27, the second STS release after JDK 25 LTS, headlines with Compact Object Headers by default — shrinking them from 64 bits for \~15% less heap and \~5% less CPU.

Other production features include Post-Quantum Key Exchange for TLS 1.3, G1 as default GC, and JFR data redaction. Several long-running previews continue: Structured Concurrency (7th), Primitive Types in Patterns (5th), Lazy Constants (3rd), and Vector API (12th incubator).

Looking also a bit more ahead, JDK 28 brings Project Valhalla's Value Objects, promising to merge OOP abstractions with primitive performance, and probably a bit more.

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We will also stream this online at https://www.youtube.com/watch?v=nt4K7W1Ej2g! If you plan to attend online, you don't need to register here since we're using this information to order food. This is also a tiny push for you to come in person!

See you there!