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

Exploring reflection in Go

Reflection in Go is a form of metaprogramming. Using reflection in Go lets the program understand its own structure. There are times when you want to use a variable at runtime that doesn't exist when the program was composed. We use reflection to check the key and value pair that is stored within an interface variable. Reflection is not often clear, so be wary of using it—it should be used in special cases when necessary. It only has runtime checks (not compile checks), so we need to use reflection with common sense.

It's important to remember that Go's variables are statically typed. There are many different variable types that we can use in Gorune, int, string, and so on. We can declare a specific type as follows:

Type foo int
var x int
var y foo

Both variables, x and y, will be int typed variables.

There are three important...