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You're reading from  Professional React Native

Product typeBook
Published inOct 2022
Reading LevelIntermediate
PublisherPackt
ISBN-139781800563681
Edition1st Edition
Languages
JavaScript
Tools
React Native
Concepts
Cross Platform Mobile Development
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Author (1)
Alexander Benedikt Kuttig
Alexander Benedikt Kuttig
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Alexander Benedikt Kuttig

Alexander Benedikt Kuttig has a master's degree in computer science and currently works as a software and app architect. With plenty of industry experience, he has created app architecture for different industries, such as education, sports and fitness, manufacturing, printing, and banking, which have been used by millions of users across the globe. He runs multiple businesses, such as Horizon Alpha, an app development agency, and Teamfit, a digital corporate health platform. He also speaks about his work at different conferences, such as RNEU and the Geekle Cross-Platform Summit, and has a blog on Medium, which he uses to write about the challenges he faces. Alexander is highly experienced as a React Native developer, speaker, and contributor.
Read more about Alexander Benedikt Kuttig

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Getting to know the Hermes engine

Hermes was brought to the React Native community at the React Native EU conference in 2019. Back then, it was already in production in Facebook’s apps for more than a year. It is completely built with mobile in mind, which changes the architectural approach completely. The following figure shows how a modern JS engine works.

Figure 8.1 – Modern JS engine pipeline (inspired by Tsvetan Mikov)

When creating and building JavaScript code, usually there is some transcompiling done to backward-compatible JS code and some JS code minification. This minified JS bundle is then sent to a device and gets executed. JS engines such as JavaScriptCore or V8 try to optimize the execution using just-in-time compilation, which, as described before, is a quite complex process and may store and optimize the wrong code statements. Hermes changes the way this is done completely.

The following figure shows how optimization and compilation...

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Professional React Native
Published in: Oct 2022Publisher: PacktISBN-13: 9781800563681
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Alexander Benedikt Kuttig

Alexander Benedikt Kuttig has a master's degree in computer science and currently works as a software and app architect. With plenty of industry experience, he has created app architecture for different industries, such as education, sports and fitness, manufacturing, printing, and banking, which have been used by millions of users across the globe. He runs multiple businesses, such as Horizon Alpha, an app development agency, and Teamfit, a digital corporate health platform. He also speaks about his work at different conferences, such as RNEU and the Geekle Cross-Platform Summit, and has a blog on Medium, which he uses to write about the challenges he faces. Alexander is highly experienced as a React Native developer, speaker, and contributor.
Read more about Alexander Benedikt Kuttig