Anthony AcciolySep 20, 2025

Long shot, but I know there are quite a few Java folks around here. Anyone familiar with JOL, JEP 519 (compact object headers), and JVM internals who can give @TheDonRaab a hand, shed some light, and confirm whether JOL is misreporting the object footprint here (and, if so, why)?

https://stackoverflow.com/questions/79769855/does-java-object-layout-jol-work-with-java-25-and-compact-object-headers-enabl

#java #java25 #jol #jep519 #jep450 #jvm #memoryLayout

Does Java Object Layout (JOL) work with Java 25 and Compact Object Headers enabled?

Java 25 was released on September 16, 2025 and included JEP 519 with Compact Object Headers (COH). The latest release version of JOL (0.17) has been released in February, 2023. I have compared the ...

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