Go In-Memory Cache Implementation Lab

🌟 Introduction

Welcome to the Go Cache Lab!

In today’s applications, performance and responsiveness are critical. One of the simplest and most effective ways to speed up your app is by using a cache—a temporary in-memory storage for frequently accessed data. In this hands-on lab, you’ll learn how to build a basic, yet powerful cache system in Go (Golang) from scratch.

Whether you're just learning Go or want to understand low-level cache implementation details, this lab is designed to be beginner-friendly, practical, and extensible.

🧰 What Will You Build?

In this step-by-step guide, you’ll create a lightweight in-memory cache with the following features:

• Simple key-value storage
• Safe access across multiple goroutines
• TTL (Time-To-Live) support for auto-expiring entries
• Background cleanup worker to free memory

🧠 What You’ll Learn

• How to define and use custom structs in Go
• How to write safe concurrent code using sync.Mutex
• How to work with timers and time-based logic
• How to build reusable components in a clean and testable way