Does the ZGC garbage collector support string deduplication?

Question

Since it is not listed as an option at https://wiki.openjdk.java.net/display/zgc/Main I assume it is not supported. Some tests code made me wonder if it is supported?

Answer 1

As of this moment, it looks like ZGC will support string deduplication as of Java 18 (from the pre-release notes):

Build 11

ZGC supports string deduplication (JDK-8267186) hotspot/gc

The Z Garbage Collector now supports string deduplication (JEP 192).

Answer 2

Per Liden, the ZGC project lead, stated on 2020-04-02:

ZGC doesn't do String deduplication (yet).

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