Level Up Your Web Apps With Go

Chapter 8Gophr Part 5: Concurrency

In this chapter, we’re going to look at resizing uploaded images to provide better performance and less wasted bandwidth on the Gophr site. To do this, we’ll use a third-party image manipulation library. At the same time we’re going to explore one of the most powerful aspects of Go that we’re yet to cover: goroutines.

Goroutines

Goroutines are a way of running your code in an asynchronous manner, meaning that you can run more than one piece of code at the same time. Most web developers are familiar with this concept when talking about Ajax requests in the browser, where you make one or more requests from the page and deal with the response when it arrives via a callback; in the meantime you can continue running ...