--- title: Behind the Scenes of React Native Multithreading: Vision Ca… description: React Native Worklets started as an internal mechanism inside React Native Reanimated, enabling small JavaScript functions called worklets to run on the UI... canonical: https://daily.dev/posts/behind-the-scenes-of-react-native-multithreading-vision-ca--vu26qlh92 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Behind the Scenes of React Native Multithreading: Vision Ca… | daily.dev og:description: React Native Worklets started as an internal mechanism inside React Native Reanimated, enabling small JavaScript functions called worklets to run on the UI... og:url: https://daily.dev/posts/behind-the-scenes-of-react-native-multithreading-vision-ca--vu26qlh92 og:image: https://api.daily.dev/og/posts/Vu26QLH92.png og:image:alt: Behind the Scenes of React Native Multithreading: Vision Ca… og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Behind the Scenes of React Native Multithreading: Vision Ca… **[Software Mansion](https://daily.dev/sources/swmansion)** · 5 min read · 0 upvotes · 0 comments ## Summary React Native Worklets started as an internal mechanism inside React Native Reanimated, enabling small JavaScript functions called worklets to run on the UI thread independently of the JS thread. As the use cases expanded beyond animations to camera frame processing, gesture handling, and audio, the team extracted worklets into a standalone library for general-purpose multithreading in React Native. The post explains how VisionCamera V5 leverages this library to run frame processors synchronously on the Camera Thread, avoiding costly thread-hops and serialization overhead that would otherwise make real-time frame processing impractical. The library allows developers to stay in JavaScript while gaining native-level concurrency without writing native modules. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Workers, SafeAreaView, backgroundImage, WebGPU, VisionCamera, React Navigation, Canvas Kit, Nitro](https://daily.dev/posts/workers-safeareaview-backgroundimage-webgpu-visioncamera-react-navigation-canvas-kit-nitro-zp1dg5abq) · This Week In React · 6 upvotes · 0 comments - [React Native ExecuTorch 8.0, Scroll Driven Header Motion, and the Money Shot Montage You Can’t Erase](https://daily.dev/posts/react-native-executorch-8-0-scroll-driven-header-motion-and-the-money-shot-montage-you-can-t-erase-5epbhhmma) · ITNEXT · 0 upvotes · 0 comments - [React Native solves some real problems](https://daily.dev/posts/react-native-solves-some-real-problems-bagnpeani) · Bytes by ui.dev · 2 upvotes · 0 comments - [Reanimated, Worklets, Helix, Screens, SecondaryRuntime, Arrangement View, View Shot](https://daily.dev/posts/reanimated-worklets-helix-screens-secondaryruntime-arrangement-view-view-shot-fxwyzjwme) · This Week In React · 0 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#react-native](https://daily.dev/tags/react-native) [View this post on daily.dev](https://daily.dev/posts/behind-the-scenes-of-react-native-multithreading-vision-ca--vu26qlh92) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Behind the Scenes of React Native Multithreading: Vision Ca…","url":"https://daily.dev/posts/behind-the-scenes-of-react-native-multithreading-vision-ca--vu26qlh92","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/behind-the-scenes-of-react-native-multithreading-vision-ca--vu26qlh92"},"datePublished":"2026-08-02T07:15:35.361Z","dateModified":"2026-08-02T07:41:28.319Z","description":"React Native Worklets started as an internal mechanism inside React Native Reanimated, enabling small JavaScript functions called worklets to run on the UI...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0d949adb7bc931ce2ba05f35b0ea6f3f?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0d949adb7bc931ce2ba05f35b0ea6f3f?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Software Mansion","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Software Mansion","logo":"https://media.daily.dev/image/upload/s--sOx0vaVZ--/f_auto,q_auto/v1785654908/logos/swmansion?_a=BAMAMicg0","url":"https://daily.dev/sources/swmansion"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/behind-the-scenes-of-react-native-multithreading-vision-ca--vu26qlh92","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"javascript,react-native","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Software Mansion","item":"https://daily.dev/sources/swmansion"},{"@type":"ListItem","position":3,"name":"Behind the Scenes of React Native Multithreading: Vision Ca…"}]} ```