# Inside Go - Part 3: Garbage Collection

DevFeed: [Inside Go - Part 3: Garbage Collection](<https://devfeed.tech/articles/inside-go-part-3-garbage-collection-39765.md>)

Original publisher: [Read original article](<https://furkankolcu.com/post/inside-go-part-3-garbage-collection>)

Author: Furkan Kolcu

Published: 2025-09-16T14:30:04Z

Content type: tutorial

Language: en

Sources: [Furkan Kolcu - Software Engineer Blog](<https://devfeed.tech/sources/furkan-kolcu-software-engineer-blog.md>)

Topics: [Go Language](<https://devfeed.tech/topics/go-language.md>), [Algorithms](<https://devfeed.tech/topics/algorithms.md>)

Tags: [algorithm](<https://devfeed.tech/tags/algorithm.md>), [garbage-collection](<https://devfeed.tech/tags/garbage-collection.md>), [go](<https://devfeed.tech/tags/go.md>), [go-garbage-collector](<https://devfeed.tech/tags/go-garbage-collector.md>), [gogc](<https://devfeed.tech/tags/gogc.md>), [golang](<https://devfeed.tech/tags/golang.md>), [inside-go](<https://devfeed.tech/tags/inside-go.md>), [performance](<https://devfeed.tech/tags/performance.md>), [runtime](<https://devfeed.tech/tags/runtime.md>), [technology](<https://devfeed.tech/tags/technology.md>)

## AI overview

This tutorial explains the evolution of Go's garbage collector from stop-the-world pauses to mostly concurrent collection. It introduces tri-color marking, explains the purpose of write barriers, and indicates that it will cover GOGC tuning.

## Source excerpt

How Go's GC grew from full pauses to mostly concurrent, what the tri-color algorithm does, why write barriers matter, and how to tune GC with GOGC without shooting yourself in the foot are how we will walk through in this part.