How Shenandoah and ZGC Achieve Sub‑10ms Pauses in Modern Java

This article compares the Shenandoah and ZGC garbage collectors introduced in OpenJDK, explaining their design goals, key differences from G1, core mechanisms such as connection matrices and forwarding or colored pointers, and detailing each collector’s concurrent phases to achieve pause times under 10 ms regardless of heap size.

Garbage CollectionJVMJava

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How Shenandoah and ZGC Achieve Sub‑10ms Pauses in Modern Java