🏃 10 Golang Libraries Useful In 2023

Tom Smykowski
4 min readDec 1, 2023

Debug, command line, tools. You’re here for a treat of some really nice Go libraries!

The standard library of Go lamguage is pretty nice. Usually you don’t need any libraries to get by.

But for some cases there’s a need for a library. Today I’ll share with you 10 Go libraries I find useful:

1. cmp

This package is intended to be a more powerful and safer alternative to reflect.DeepEqual for comparing whether two values are semantically equal. It is intended to only be used in tests, as performance is not a goal and it may panic if it cannot compare the values.


// This Transformer sorts a []int.
trans := cmp.Transformer("Sort", func(in []int) []int {
out := append([]int(nil), in...) // Copy input to avoid mutating it
return out

x := struct{ Ints []int }{[]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}}
y := struct{ Ints []int }{[]int{2, 8, 0, 9, 6, 1, 4, 7, 3, 5}}
z := struct{ Ints []int }{[]int{0, 0, 1, 2, 3, 4, 5, 6, 7, 8}}

fmt.Println(cmp.Equal(x, y, trans))
fmt.Println(cmp.Equal(y, z, trans))
fmt.Println(cmp.Equal(z, x, trans))


2. protobuf

This project hosts the Go implementation for protocol buffers, which is a language-neutral, platform-neutral, extensible mechanism for serializing structured data. The protocol buffer language is a language for specifying the schema for structured data.

Protocol buffers:

Protocol buffers are Google’s language-neutral, platform-neutral, extensible mechanism for serializing structured data – think XML, but smaller, faster, and simpler. You define how you want your data to be structured once, then you can use special generated source code to easily write and read your structured data to and from a variety of data streams and using a variety of languages.


3. fsnotify

fsnotify is a Go library to provide cross-platform filesystem notifications on Windows, Linux, macOS, BSD, and illumos.


package main

import (



Tom Smykowski

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