Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
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The go tool trace utility

Code tracing is a process that allows you to learn information such as the operation of the garbage collector, the lifetime of goroutines, the activity of each logical processor, and the number of operating system threads used. The go tool trace utility is a tool for viewing the data stored in trace files, which can be generated in any one of the following three ways:

  • With the runtime/trace package
  • With the net/http/pprof package
  • With the go test -trace command

This section illustrates the use of the first technique using the code of traceCLA.go:

package main
import (

The runtime/trace package is required for collecting all kinds of tracing data—there is no point in selecting specific tracing data as all tracing data is interconnected.

func main() {
    filename := path.Join(os.TempDir(), &quot...