Book Image

Hands-On High Performance with Go

By : Bob Strecansky
Book Image

Hands-On High Performance with Go

By: Bob Strecansky

Overview of this book

Go is an easy-to-write language that is popular among developers thanks to its features such as concurrency, portability, and ability to reduce complexity. This Golang book will teach you how to construct idiomatic Go code that is reusable and highly performant. Starting with an introduction to performance concepts, you’ll understand the ideology behind Go’s performance. You’ll then learn how to effectively implement Go data structures and algorithms along with exploring data manipulation and organization to write programs for scalable software. This book covers channels and goroutines for parallelism and concurrency to write high-performance code for distributed systems. As you advance, you’ll learn how to manage memory effectively. You’ll explore the compute unified device architecture (CUDA) application programming interface (API), use containers to build Go code, and work with the Go build cache for quicker compilation. You’ll also get to grips with profiling and tracing Go code for detecting bottlenecks in your system. Finally, you’ll evaluate clusters and job queues for performance optimization and monitor the application for performance regression. By the end of this Go programming book, you’ll be able to improve existing code and fulfill customer requirements by writing efficient programs.
Table of Contents (20 chapters)
Section 1: Learning about Performance in Go
Section 2: Applying Performance Concepts in Go
Section 3: Deploying, Monitoring, and Iterating on Go Programs with Performance in Mind

Understanding Go generate

As of Go version 1.4, the language contains a tool that helps with code generation, called Go generate. Go generate scans source code for general commands to run. This operates independently of go build, and thus must be run before code is built. Go generate is run by the code author, not by users of the compiled binary. This tool runs similarly to how Makefiles and shell scripts are typically used, but it is packaged with the Go tool and we don't need to include any other dependencies.

Go generate will search the code base for lines with the following pattern: //go:generate command argument.

A generated source file should have a line such as the following, in order to convey that the code was generated:

^// Code generated .* DO NOT EDIT\.$

Go generate utilizes a group of variables when the generator is run:

  • $GOARCH: The architecture of the executing...