This tutorial is a beginner-friendly, step-by-step guide to understanding Grand Central Dispatch (GCD) using a simple and intuitive restaurant analogy 🍽️.

👉 Start here: https://github.com/rebeloper/GCDExplained/wiki

This is the full tutorial series, structured step-by-step. Follow the chapters in order to build a solid understanding from the ground up.

Instead of throwing complex terminology at you, it builds your understanding gradually—starting from the why behind GCD and moving all the way to advanced concepts like semaphores, barriers, and dispatch sources.

Each chapter is:

• short and focused (2–4 minutes)
• visually structured with ASCII diagrams
• reinforced with tiny Swift examples
• grounded in real-world intuition

Every chapter also includes a 🔄 vs. Swift Concurrency section, mapping the GCD concept to its modern async/await equivalent — this repo is a companion to SwiftConcurrencyExplained.

By the end of this series, you won't just "know" GCD—you'll actually understand how and why it works.

Perfect for:

• beginners learning GCD for the first time
• developers who want to understand what async/await replaced
• anyone who prefers visual, analogy-driven learning