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Use CompactObjectHeaders#353

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errt wants to merge 2 commits intodevelopfrom
feature/compact-object-headers
Open

Use CompactObjectHeaders#353
errt wants to merge 2 commits intodevelopfrom
feature/compact-object-headers

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@errt errt commented Dec 17, 2025

The new JVM option to use compact object headers (https://openjdk.org/jeps/519) should save significant RAM for OPAL.

Note that -XX:+IgnoreUnrecognizedVMOptions is necessary to keep compatibility with older JVMs.
Note also that javaOptions are only applied to forked VMs, which is why we enforce fork := true now for all subprojects.

@errt errt requested a review from johannesduesing December 17, 2025 13:30
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