Book Image

Mastering Go - Second Edition

By : Mihalis Tsoukalos
Book Image

Mastering Go - Second Edition

By: Mihalis Tsoukalos

Overview of this book

Often referred to (incorrectly) as Golang, Go is the high-performance systems language of the future. Mastering Go, Second Edition helps you become a productive expert Go programmer, building and improving on the groundbreaking first edition. Mastering Go, Second Edition shows how to put Go to work on real production systems. For programmers who already know the Go language basics, this book provides examples, patterns, and clear explanations to help you deeply understand Go’s capabilities and apply them in your programming work. The book covers the nuances of Go, with in-depth guides on types and structures, packages, concurrency, network programming, compiler design, optimization, and more. Each chapter ends with exercises and resources to fully embed your new knowledge. This second edition includes a completely new chapter on machine learning in Go, guiding you from the foundation statistics techniques through simple regression and clustering to classification, neural networks, and anomaly detection. Other chapters are expanded to cover using Go with Docker and Kubernetes, Git, WebAssembly, JSON, and more. If you take the Go programming language seriously, the second edition of this book is an essential guide on expert techniques.
Table of Contents (15 chapters)

The Go scheduler revisited

A scheduler is responsible for distributing the amount of work that needs to be done over the available resources in an efficient way. In this section, we will examine the way that the Go scheduler operates in much greater depth than in the previous chapter. As you already know, Go works using the m:n scheduler (or M:N scheduler). It schedules goroutines, which are lighter than OS threads, using OS threads. First, though, let us review the necessary theory and define some useful terms.

Go uses the fork-join concurrency model. The fork part of the model states that a child branch can be created at any point of a program. Analogously, the join part of the Go concurrency model is where the child branch ends and joins with its parent. Among other things, both sync.Wait() statements and channels that collect the results of goroutines are join points, whereas...