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ECMAScript Cookbook

You're reading from   ECMAScript Cookbook Over 70 recipes to help you learn the new ECMAScript (ES6/ES8) features and solve common JavaScript problems

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Product type Paperback
Published in Mar 2018
Publisher Packt
ISBN-13 9781788628174
Length 348 pages
Edition 1st Edition
Languages
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Author (1):
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 Harrison Harrison
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Harrison
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Table of Contents (20) Chapters Close

Title Page
Copyright and Credits
Dedication
PacktPub.com
Contributors
Preface
1. Building with Modules FREE CHAPTER 2. Staying Compatible with Legacy Browsers 3. Working with Promises 4. Working with async/await and Functions 5. Web Workers, Shared Memory, and Atomics 6. Plain Objects 7. Creating Classes 8. Inheritance and Composition 9. Larger Structures with Design Patterns 10. Working with Arrays 11. Working with Maps and Symbols 12. Working with Sets 1. Other Books You May Enjoy Index

Using Atomics to coordinate the use of shared memory


In the previous recipe, we used multiple workers to produce portions of a result. We could merge these results in the main thread. While valid, this approach doesn't take full advantage of parallel processing. It would be preferable if the workers could accumulate the results themselves.

Mutating shared memory in multiple parallel threads exposes the possibility of race conditions. This is when several operations need to occur in a specific order that is not enforced. Luckily, we can use the Atomics API to coordinate these operations.

In this recipe, we'll see how to use the Atomics API to accumulate results while avoiding race conditions.

Getting ready

This recipe assumes you already have a workspace that allows you to create and run ES modules in your browser. If you don't, please see the first two chapters.

How to do it...

  1. Open your command-line application and navigate to your workspace.
  2. Create a new folder named 05-08-use-atomics-to-coordinate...
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