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 (20 chapters)
Title Page

Measuring execution time

In this section, you are going to learn how to measure the execution time of one or more commands in Go. The same technique can be applied for measuring the execution time of a function or a group of functions. The name of the Go program is execTime.go and it will be presented in three parts.

This is an easy-to-implement technique that is both very powerful and handy. Do not underestimate the simplicity of Go.

The first part of execTime.go is as follows:

package main 
import ( 
func main() { 
    start := time.Now() 
    duration := time.Since(start) 
    fmt.Println("It took time.Sleep(1)", duration, "to finish.") 

You will need the functionality offered by the time package in order to measure the execution time of a command. All the job is done by the...