Book Image

Hands-On JavaScript High Performance

By : Justin Scherer
1 (1)
Book Image

Hands-On JavaScript High Performance

1 (1)
By: Justin Scherer

Overview of this book

High-performance web development is all about cutting through the complexities in different layers of a web app and building services and APIs that improve the speed and performance of your apps on the browser. With emerging web technologies, building scalable websites and sustainable web apps is smoother than ever. This book starts by taking you through the web frontend, popular web development practices, and the latest version of ES and JavaScript. You'll work with Node.js and learn how to build web apps without a framework. The book consists of three hands-on examples that help you understand JavaScript applications at both the server-side and the client-side using Node.js and Svelte.js. Each chapter covers modern techniques such as DOM manipulation and V8 engine optimization to strengthen your understanding of the web. Finally, you’ll delve into advanced topics such as CI/CD and how you can harness their capabilities to speed up your web development dramatically. By the end of this web development book, you'll have understood how the JavaScript landscape has evolved, not just for the frontend but also for the backend, and be ready to use new tools and techniques to solve common web problems.
Table of Contents (15 chapters)

Adding caching and clustering

First, we will start by adding a cache to our server. We do not want to constantly recompile pages that we have already compiled before. To do this, we will implement a class that surrounds a map. This class will keep track of 10 files at a time. We will also implement the timestamp when the file was last used. When we reach the eleventh file, we will see that it is not in the cache and that we have hit the maximum number of files we can hold in the cache. We will replace the compiled page with the earliest timestamped file.

This is known as a Least Recently Used (LRU) cache. There are many other types of caching strategies out there, such as a Time To Live (TTL) cache. This type of cache will eliminate files that have been in the cache for too long. This is a great type of cache for when we keep using the same files over and over again, but we eventually...