Leak-Proof Your Go Code: Goroutines

Mastering WaitGroup, Context, and more for resilient Go programming.

Ulas Can Cengiz
6 min readMay 18, 2023
Photo by Daan Mooij on Unsplash

Go, often referred to as Golang, is a statically typed, compiled language known for its simplicity, efficiency, and ability to handle concurrent operations. Designed by Google, it has grown in popularity due to its unique features and capabilities, one of which is its native support for concurrency through goroutines. As a Go developer, you’ll find that goroutines become an essential tool, enabling you to perform tasks concurrently, thereby optimizing your code for speed and performance. But like all powerful tools, they require careful handling to prevent potential issues — one of these being goroutine leaks.

A goroutine leak, much like a memory leak in other languages, is a situation where goroutines are spawned but not terminated, often due to a logical flaw in the program. These orphaned goroutines stick around in the background, consuming system resources without contributing to the productive operations of the application. Over time, as more and more goroutines leak, your application may start to exhibit performance issues, or worse, crash due to resource exhaustion. Understanding and preventing such leaks is a key aspect of writing reliable, efficient Go code.

Understanding Goroutine Leaks

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