# JDK 27 Runtime Updates Release Notes

DevFeed: [JDK 27 Runtime Updates Release Notes](<https://devfeed.tech/articles/jdk-27-runtime-updates-release-notes-15132.md>)

Original publisher: [Read original article](<https://inside.java/2026/09/12/jdk-27-runtime-updates/>)

Author: Billy Korando

Published: 2026-09-12T00:00:00Z

Content type: release

Language: en

Sources: [Inside Java](<https://devfeed.tech/sources/inside-java.md>)

Topics: [JDK 27](<https://devfeed.tech/topics/jdk-27.md>), [Release notes](<https://devfeed.tech/topics/release-notes.md>), [releases](<https://devfeed.tech/topics/releases.md>), [Java](<https://devfeed.tech/topics/java.md>)

Tags: [env-file-security](<https://devfeed.tech/tags/env-file-security.md>), [gc](<https://devfeed.tech/tags/gc.md>), [jdk-27](<https://devfeed.tech/tags/jdk-27.md>), [memory](<https://devfeed.tech/tags/memory.md>), [net-conf](<https://devfeed.tech/tags/net-conf.md>), [passwords](<https://devfeed.tech/tags/passwords.md>), [performance](<https://devfeed.tech/tags/performance.md>), [release](<https://devfeed.tech/tags/release.md>), [release-notes](<https://devfeed.tech/tags/release-notes.md>)

## AI overview

This article reviews runtime updates in JDK 27, including G1GC becoming the default garbage collector in all cases, Compact Object Headers being enabled by default, and improved JFR redaction and filtering for sensitive information such as passwords and API keys.

## Source excerpt

Let's review the performance updates, new runtime features, and other changes to existing features that are in the JDK 27 release!