DeWu Technology
Oct 11, 2023 · Fundamentals
Understanding JVM Pointer Compression and Memory Layout
The article explains how the JVM reduces memory consumption on 64‑bit systems by using compressed ordinary object pointers (compressed oops), describes pointer size, alignment and padding, shows C struct and JVM object layout examples, and demonstrates inspection tools like HSDB and XPocket for analyzing object memory footprints.
HSDBJVMPointer Compression
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