---
title: "Java Performance Update: From JDK 21 to JDK 25 – Inside.java"
url: https://daily.dev/posts/java-performance-update-from-jdk-21-to-jdk-25-inside-java-frayw9b7n
source_url: https://inside.java/2026/03/08/jfokus-java-performance-update/
type: article
source: "Inside Java"
published: 2026-03-08T17:53:14.035Z
updated: 2026-03-08T17:53:32.442Z
tags: ["performance", "java", "jvm"]
reading_time: 1
upvotes: 0
comments: 0
language: en
---

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# Java Performance Update: From JDK 21 to JDK 25 – Inside.java

**[Inside Java](https://daily.dev/sources/inside_java)** · 1 min read · 0 upvotes · 0 comments

## Summary

A conference talk from Jfokus 2026 covering 13 concrete performance improvements in JDK 25 compared to JDK 21, spanning standard libraries, the JIT compiler, and garbage collectors. The presentation explores design tradeoffs behind these optimizations and how JDK engineers evaluate real-world performance. It also highlights the new preview feature Stable Value, which allows a field to combine benefits of both mutable and immutable data for potential speedups in existing applications.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://inside.java/2026/03/08/jfokus-java-performance-update/>

---

Tags: [#performance](https://daily.dev/tags/performance), [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm)

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