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Garbage Collection

Let’s learn about garbage collection in Go.

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Garbage collection is the process of freeing up memory space that is not being used. In other words, the GC sees which objects are out of scope and cannot be referenced anymore and frees the memory space they consume. This process happens in a concurrent way while a Go program is running and not before or after the execution of the program. The documentation of the Go GC implementation states the following:

“The GC runs concurrently with mutator threads, is type accurate (also known as precise), and allows multiple GC threads to run in parallel. It is a concurrent mark-and-sweep that uses a write barrier. It is non-generational and non-compacting. Allocation is done using size segregated per P allocation areas ...

Course Introduction

Introduction to Go

Basic Go Data Types

Composite Data Types

Reflection and Interfaces

Go Packages and Functions

Telling a UNIX System What to Do

Go Concurrency

Building Web Services

Working with TCP/IP and WebSocket

Working with REST APIs

Code Testing and Profiling

Working with gRPC

Go Generics

Conclusion

Appendix A—Go Garbage Collector

Garbage Collection