A deep dive into how React Native handles memory when JavaScript and native code share ArrayBuffer data. Learn why async processing can break, how GC affects raw pointers, and the safe patterns for building high-performance native integrations.

Learn how to move beyond file-based audio APIs and work directly with in-memory PCM data in React Native. This guide shows how to construct WAV buffers, use JSI for zero-copy transfers, and enable real-time audio processing.

TurboModules provide a type-safe way to write native code in React Native. JSI sits underneath as a lower-level API, enabling direct interaction with the JavaScript runtime. Beyond what TurboModules expose, JSI gives you access to powerful features, such as working directly with ArrayBuffers. This article shows how to inject a custom binding step by step.

Explore how fibers enable lightweight, cooperative multitasking. This guide walks through building a simple scheduler, managing task dependencies without locks, and using Tracy to visualize performance.

Learn how to profile and optimize multithreaded apps. Discover why more threads don’t always mean faster results and how bad thread contention really is.

Learn how to profile React Native internals with Tracy to uncover bottlenecks, optimize performance, and gain deep insights into your app’s native behavior.

Learn why your React Native app’s bundle size matters & how tools like Expo Atlas help you optimize performance, reduce app startup time & improve dependency management.

Learn how to profile your code to uncover performance bottlenecks and optimize speed using the right tools and relevant debugging strategies.

Learn how the new React Compiler optimizes performance and reduces development headaches with the power of automation.

Discover how GPU rendering powers 2D and 3D graphics. Learn about the GPU's role in creating vibrant visuals on your screen and the process behind it.

Learn how to optimize React Native app performance by managing native dependencies effectively. Discover tools to identify and remove unused dependencies.

Discover the role of Scalable Vector Graphics (SVGs) in app development. Learn how to optimize SVGs with tools like SVGO.

If Metro slows down your app, optimize your app's JavaScript bundle with alternative performant bundles, like Re.Pack, react-native-esbuild, or rnx-kit.

Improve mobile user experience with real-time data by profiling your React Native app with tools like Instruments on iOS and Android Profiler on Android.

Explore the comparison between Lottie and Rive as solutions for mobile app animation, learning about their advantages and limitations.

Use native solutions to achieve smooth animations and gesture-driven interface at 60FPS.

Use libraries dedicated to mobile and build features faster on many platforms at once, without compromising on the performance and user experience.

Find the balance between native and JavaScript to build fast-working and easy-to-maintain apps.

How to use dedicated, higher-ordered React Native components to improve user experience and performance of your apps.

Internationalization is all about offering your products in such a way that they can be localized for languages and cultures easily.

A quick guide to optimizing your React Native application for users that may use your application in offline mode.

Find out how to monitor React and React Native performance better than ever before with Reassure's new features.

Even faster React Native apps? That's possible with Nitro Modules! Tune in to the conversation with their creator, Marc Rousavy.

Join us as we explore the latest developments in React Native performance optimization with experts from Expo and Callstack.

Get insights into profiling your React Native app from our experts in this podcast episode.

Listen to Mike Grabowski talk about React Native FastIO, a collection of primitives for working with data in React Native and its performance benefits.

Animations and performance: friends or foes? Tune in to learn how not to break your React Native app's user experience.

View flattening, React 19 hooks, real DevTools tips-learn what actually helps your React Native app run faster.

Discover how Expensify defines and tracks performance metrics that actually impact user experience.

Join us for a deep dive into Polygen: Callstack Incubator's breakthrough in React Native development!

Find out about executing WASM in React Native, the challenges of JIT restrictions on iOS, and how Callstack's wasm2c solution enables performant native modules.

Developers often fix performance issues in React apps, but this is unsustainable and prone to regressions. Reassure, a testing library, helps spot problems before production, enhancing automated testing suites.

Learn to fix JS performance issues in React Native-from debounce bugs to Redux selectors, in this hands-on webinar with real code examples.

Watch Callstack's webinar on React Native JS performance. Learn to fix bottlenecks, leaks & FPS issues from the 2025 Ultimate Guide authors.

Watch a webinar on optimizing React Native apps to learn the top 5 metrics every React Native team should track to improve performance, reduce load time, and boost user experience.

Learn how Callstack improved a React Native app’s performance and user ratings through a real-world audit. Watch the webinar to see how it was done.

Learn how to improve your React Native app's performance with practical tactics, metrics, and real-life case studies from Callstack experts.