Java
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1 week agoJava 25 for Scala Services: Production Impact Report
Migrating Scala services to Java 25 using compact object headers and G1 string deduplication reduced heap usage for workloads with many repetitive strings.
Nine of these features are focused on performance and runtime. Seven of these, Scoped Values, Key Derivation Function API, Module Import Declarations, Compact Source Files and Instance Main Methods, Flexible Constructor Bodies, Compact Object Headers and Generational Shenandoh, are finalized after having evolved from their respective incubations and previews with the exception of the latter two that were experimental features in JDK 24.
One of the biggest annoyances of Java has always been the amount of code needed to write even "Hello World." This is a barrier for new users. Oracle wants to do something about this. "Paving the on-ramp" is therefore receiving a lot of attention, including in the pre-briefing we attended on Java 25. A good example of this is JEP 512 (Compact Source Files and Instance Main Methods). New users can write their first programs without needing extensive knowledge of the language.