--- title: The React Compiler | daily.dev description: The React Compiler is a build-time Babel plugin that automatically memoizes React components, eliminating the need for manual useMemo, useCallback, and... canonical: https://daily.dev/posts/the-react-compiler-9txqkrlpw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The React Compiler | daily.dev og:description: The React Compiler is a build-time Babel plugin that automatically memoizes React components, eliminating the need for manual useMemo, useCallback, and... og:url: https://daily.dev/posts/the-react-compiler-9txqkrlpw og:image: https://api.daily.dev/og/posts/9TXQkrLPw.png og:image:alt: The React Compiler 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. # The React Compiler **[Neciu Dan](https://daily.dev/sources/neciudan)** · 18 min read · 2 upvotes · 0 comments ## Summary The React Compiler is a build-time Babel plugin that automatically memoizes React components, eliminating the need for manual useMemo, useCallback, and React.memo. Instead of inserting hook calls, it generates lightweight cache-slot checks using reference equality. The compiled output can memoize values after early returns (where hooks are illegal), and skips child re-renders by reusing identical JSX element objects. Setup is covered for Vite, Next.js, and Expo (enabled by default in SDK 54+). The compiler supports React 17 and 18 via a polyfill runtime package. Existing useMemo calls should be left in place initially due to subtle effect-firing risks. The compiler skips components that violate Rules of React, and opt-out/opt-in directives ('use no memo'/'use memo') are available. Real-world numbers from Meta, Sanity, and Wakelet show 10–30% render time improvements. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [React Compiler Explained: Do You Still Need useMemo, useCallback, and React.memo?](https://daily.dev/posts/react-compiler-explained-do-you-still-need-usememo-usecallback-and-react-memo--4dhnwgumi) · Syncfusion · 30 upvotes · 1 comments - [Untitled](https://daily.dev/posts/untitled-ci2ugsv15) · SitePoint · 1 upvotes · 1 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#react](https://daily.dev/tags/react), [#performance](https://daily.dev/tags/performance) [View this post on daily.dev](https://daily.dev/posts/the-react-compiler-9txqkrlpw) ```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":"The React Compiler","url":"https://daily.dev/posts/the-react-compiler-9txqkrlpw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-react-compiler-9txqkrlpw"},"datePublished":"2026-07-10T18:34:11.286Z","dateModified":"2026-07-10T18:34:47.507Z","description":"The React Compiler is a build-time Babel plugin that automatically memoizes React components, eliminating the need for manual useMemo, useCallback, and...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b55a7ac75968edee0d74183099a9ff78?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b55a7ac75968edee0d74183099a9ff78?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Neciu Dan","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":"Neciu Dan","logo":"https://media.daily.dev/image/upload/s--xeHLtkTA--/f_auto,q_auto/v1776585705/logos/neciudan","url":"https://daily.dev/sources/neciudan"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/the-react-compiler-9txqkrlpw","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"javascript,react,performance","timeRequired":"PT18M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Neciu Dan","item":"https://daily.dev/sources/neciudan"},{"@type":"ListItem","position":3,"name":"The React Compiler"}]} ```