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Hands-On JavaScript High Performance

You're reading from   Hands-On JavaScript High Performance Build faster web apps using Node.js, Svelte.js, and WebAssembly

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Product type Paperback
Published in Feb 2020
Publisher Packt
ISBN-13 9781838821098
Length 376 pages
Edition 1st Edition
Languages
Tools
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Author (1):
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Justin Scherer Justin Scherer
Author Profile Icon Justin Scherer
Justin Scherer
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Table of Contents (15) Chapters Close

Preface 1. Tools for High Performance on the Web 2. Immutability versus Mutability - The Balance between Safety and Speed FREE CHAPTER 3. Vanilla Land - Looking at the Modern Web 4. Practical Example - A Look at Svelte and Being Vanilla 5. Switching Contexts - No DOM, Different Vanilla 6. Message Passing - Learning about the Different Types 7. Streams - Understanding Streams and Non-Blocking I/O 8. Data Formats - Looking at Different Data Types Other Than JSON 9. Practical Example - Building a Static Server 10. Workers - Learning about Dedicated and Shared Workers 11. Service Workers - Caching and Making Things Faster 12. Building and Deploying a Full Web Application 13. WebAssembly - A Brief Look into Native Code on the Web 14. Other Books You May Enjoy

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...

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