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Hermes

Hermes is React Native's optimized JavaScript engine that improves app performance, reduces memory usage, and decreases app size. Discover how to enable and configure Hermes, debug applications effectively, and leverage its capabilities to create faster, more efficient React Native applications.

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Article
12/18/2025

Why You Don’t Have to Minify JavaScript Code in React Native Apps

React Native skips JavaScript minification in production because Hermes handles dead code elimination at the bytecode level. Here’s how and why it works.
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Article
12/4/2021

How to Optimize Your Android App Startup Time With Hermes

Learn how to achieve better performance and optimize Android app startup time with Hermes.
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Article
6/14/2021

Technical Guide, Part 2: Integrating Hermes With React Native

Interested in the Hermes engine? Check the second part of our expert guide to find out how to integrate Hermes with React Native.
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Article
5/26/2021

Technical Guide, Part 1: Compiling Hermes for Apple Platforms

Want to use Hermes in your React Native app on iOS? Find out how to compile Hermes for Apple platforms. Check the first part of our expert technical guide.
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Article
4/21/2021

Hermes Performance on iOS

Wondering how the Hermes engine performs on iOS? We tested it on a React Native mobile app. Check the results and see how it compares to JSC.
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Article
4/14/2021

Bringing Hermes to iOS in React Native 0.64

Hermes is now available for iOS as well. Find out more about this JS engine - check the first part of our series on bringing Hermes to iOS.
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podcast
12/4/2025

From Static Hermes to Hermes V1: The Road to Default

Nicola Corti (Meta) explains the evolution of Static Hermes into Hermes V1, the performance boosts it ships, and the (experimental) path to making it the new default engine.
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podcast
5/11/2021

React Native 0.64 With Hermes for iOS

Discover how Hermes boosts React Native performance on iOS and macOS, with insights into AOT, bytecode precompilation, and the future of Hermes support.
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Event
11/6/2025

Hermes V1: What It Is, What It Isn’t, and What’s Next

Łukasz Chludziński, Szymon Chmal, and Matt Hargett unpack Hermes V1, covering what’s new, what’s changing, and what’s ahead for React Native performance.
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We don't follow best practices, we set them
React Native Core Contributors
Trusted by Meta, Microsoft, and the community
We don't follow best practices, we set them
React Native Core Contributors
Trusted by Meta, Microsoft, and the community
We don't follow best practices, we set them
React Native Core Contributors
Trusted by Meta, Microsoft, and the community
We don't follow best practices, we set them
React Native Core Contributors
Trusted by Meta, Microsoft, and the community
We don't follow best practices, we set them
React Native Core Contributors
Trusted by Meta, Microsoft, and the community
We don't follow best practices, we set them
React Native Core Contributors
Trusted by Meta, Microsoft, and the community
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We guide teams in optimizing React Native with the Hermes engine.

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