--- title: How's Linear so fast? A technical breakdown | daily.dev description: A deep technical breakdown of how Linear achieves near-instant performance in a client-side rendered web app. Key techniques include: storing the database in... canonical: https://daily.dev/posts/uuupb6zie twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How's Linear so fast? A technical breakdown | daily.dev og:description: A deep technical breakdown of how Linear achieves near-instant performance in a client-side rendered web app. Key techniques include: storing the database in... og:url: https://daily.dev/posts/uuupb6zie og:image: https://api.daily.dev/og/posts/uuupB6ZiE.png og:image:alt: Post cover image 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. # How's Linear so fast? A technical breakdown **[Ido Shamun](https://daily.dev/sources/28849d86070e4c099c877ab6837c61f0)** · [@idoshamun](https://daily.dev/idoshamun) · 107 upvotes · 16 comments ## Summary A deep technical breakdown of how Linear achieves near-instant performance in a client-side rendered web app. Key techniques include: storing the database in the browser via IndexedDB with a local-first sync engine, MobX observables enabling granular per-property re-renders, aggressive code splitting with module preloading and service worker precaching, inlined critical CSS and JavaScript in the app shell for zero-flash first paint, optimistic mutations that never wait on the network, keyboard-first design with a command palette backed by in-memory data, and GPU-only animations with sub-100ms durations. The article also provides practical takeaways like using SWR/TanStack Query optimistic updates, proper font preloading with matching CORS attributes, and avoiding layout-triggering CSS animations. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@eliasaliche** · 5 upvotes > Browsers are basically becoming OS's. > > 2GB of RAM on for three tabs suddenly don't sound that bad **@georgeongoro** · 0 upvotes > A reminder that performance is often a matter of clever architecture and design, not just code optimization, i personally use IndexedDB for offline first applications whose data is not required to be synced to the cloud, this way i avoid unnecessary server usage, and the app becomes fast. I love this approach ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 0 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#webdev](https://daily.dev/tags/webdev), [#react](https://daily.dev/tags/react), [#local-first](https://daily.dev/tags/local-first) [View this post on daily.dev](https://daily.dev/posts/uuupb6zie) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/uuupb6zie","headline":"How's Linear so fast? 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