Spring Full-Stack Practical Cases
Jul 18, 2021 · Fundamentals
How Much Memory Does a Java Object Really Use? A JOL Walkthrough
This article explains how to calculate the exact memory footprint of a Java object using the OpenJDK JOL tool, covering object header composition, 8‑byte alignment, padding rules, and concrete examples for regular objects and char arrays.
Byte AlignmentJOLJava
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