JS Runtimes

Mastering V8 Heap Allocation: How V8 Manages Objects and Hidden Classes in Memory

Master JavaScript compiler internals. Learn how V8 uses Hidden Classes and Inline Caches to optimize dynamic object access at C++ speeds.

Sachin SharmaCreator

Jun 4, 2026

6 min read

Mastering V8 Heap Allocation: How V8 Manages Objects and Hidden Classes in Memory

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Quick Overview

Master JavaScript compiler internals. Learn how V8 uses Hidden Classes and Inline Caches to optimize dynamic object access at C++ speeds.

V8 Engine JavaScript Internals Memory Management Hidden Classes Compiler Optimization Performance

Sachin Sharma

Software Developer

Building digital experiences at the intersection of design and code. Sharing weekly insights on engineering, productivity, and the future of tech.

Building a Dynamic WebXR AR Portfolio with A-Frame and Three.js

Take your personal brand into spatial computing. Learn how to design and build an interactive, browser-native augmented reality (AR) portfolio using A-Frame and Three.js.

Building a Local RAG Pipeline inside the Browser with SQLite-VSS and WebGPU

Learn how to build a fully client-side Retrieval-Augmented Generation (RAG) pipeline. Query documents locally using SQLite-VSS vector search and WebGPU-accelerated LLMs.