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compressed-oops

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Architect's Tech Stack

Sep 29, 2021 · Fundamentals

Understanding Java Object Memory Layout, Size of new Object() and Heap Allocation

This article explains how Java objects are laid out in memory, compares the heap locations of fields and local variables, analyzes the byte size of a plain new Object() with and without compressed oops, demonstrates measurement using JOL, and reviews related heap regions and garbage‑collection concepts.

Garbage CollectionJVMJava

0 likes · 13 min read

Understanding Java Object Memory Layout, Size of new Object() and Heap Allocation

Architect's Tech Stack

Jun 5, 2021 · Fundamentals

Understanding Java Object Memory Layout and the Size of new Object()

This article explains how Java objects are stored in memory, analyzes the heap layout, object header, instance data, and padding, demonstrates the byte size of a new Object() with and without compressed OOPs, and discusses object access methods and garbage‑collection regions.

Garbage CollectionJVMJava

0 likes · 12 min read

Understanding Java Object Memory Layout and the Size of new Object()