GitHub user ppkarwasz added a comment to the discussion: Is using %uuid{RANDOM}
pattern in JsonTemplateLayout considered garbage-free?
Neither one is GC-free. Each one will create an instance of
[`UUID`](https://docs.oracle.com/javase/8/docs/api/java/util/UUID.html) and
`String`. Scalar replacement might occur, when the JVM is hot enough, but you
should test it on a concrete version of the JVM.
GitHub link:
https://github.com/apache/logging-log4j2/discussions/3585#discussioncomment-12696831
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