--- title: TypeScript 7 Is Here (And It's 10× Faster) | daily.dev description: TypeScript 7 delivers dramatic build speed improvements through parallel type checking. A live demo compiling the Visual Studio Code codebase (1.3 million... canonical: https://daily.dev/posts/typescript-7-is-here-and-it-s-10-faster--t4mnzhmsw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: TypeScript 7 Is Here (And It's 10× Faster) | daily.dev og:description: TypeScript 7 delivers dramatic build speed improvements through parallel type checking. A live demo compiling the Visual Studio Code codebase (1.3 million... og:url: https://daily.dev/posts/typescript-7-is-here-and-it-s-10-faster--t4mnzhmsw og:image: https://api.daily.dev/og/posts/t4MNzhMSw.png og:image:alt: TypeScript 7 Is Here (And It's 10× Faster) 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. # TypeScript 7 Is Here (And It's 10× Faster) **[Microsoft Developer](https://daily.dev/sources/microsoftdeveloper)** · 1 min read · 16 upvotes · 5 comments ## Summary TypeScript 7 delivers dramatic build speed improvements through parallel type checking. A live demo compiling the Visual Studio Code codebase (1.3 million lines, ~8,000 files) shows TypeScript 6 taking ~50 seconds versus TypeScript 7 completing in ~6.5 seconds — a 7.5x speedup. By default, TypeScript 7 spins up four concurrent type checkers, each handling a quarter of the files. On a 16-core machine, build time drops further to ~4.5 seconds, achieving a 12x improvement while using roughly the same memory as the old compiler. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How much faster is TypeScript 7 than TypeScript 6 at compiling large codebases? TypeScript 7 compiles the Visual Studio Code codebase (1.3 million lines, about 8,000 files) in roughly 6.5 seconds versus about 50 seconds for TypeScript 6, a 7.5x speedup. Running four concurrent type checkers on a 16-core machine brings it down to about 4.5 seconds, roughly 10-12x faster, while using about the same memory as the old compiler. _Track how typescript 7's compiler speedup could cut CI build times on daily.dev before planning your upgrade._ ## Community discussion Top comments from developers on daily.dev. **@fahimahammed** · 0 upvotes >  **@ra\_jeeves** · 0 upvotes > This is a great improvement. **@lauramoss** · 0 upvotes >  **@trevorsuna** · 0 upvotes > A 7.5x speedup on the VS Code codebase is hard to ignore. Parallel checking seems like a straightforward win, but I’m curious how the gains hold up in smaller repos and CI runners with fewer cores—that’s where many teams will feel it first. **@pdfopsdev** · 0 upvotes > anyone tried this yet on a repo with heavy project references / composite builds? the vscode demo is basically one giant project, curious if the parallel checkers hold up on cross-project incremental builds or if that path still falls back to single threaded. ## Similar posts on daily.dev - [TypeScript 7 Is “10x Faster.”](https://daily.dev/posts/typescript-7-is-10x-faster--2rlebp7bx) · Medium · 1 upvotes · 1 comments --- Tags: [#performance](https://daily.dev/tags/performance), [#typescript](https://daily.dev/tags/typescript), [#compiler](https://daily.dev/tags/compiler) [View this post on daily.dev](https://daily.dev/posts/typescript-7-is-here-and-it-s-10-faster--t4mnzhmsw) ```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":"TypeScript 7 Is Here (And It's 10× Faster)","url":"https://daily.dev/posts/typescript-7-is-here-and-it-s-10-faster--t4mnzhmsw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/typescript-7-is-here-and-it-s-10-faster--t4mnzhmsw"},"datePublished":"2026-07-27T20:46:13.621Z","dateModified":"2026-09-14T06:15:51.272Z","description":"TypeScript 7 delivers dramatic build speed improvements through parallel type checking. 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Sharma","url":"https://daily.dev/ra_jeeves","image":"https://media.daily.dev/image/upload/s--GSwfHept--/f_auto/v1753591600/avatars/avatar_vCVYeh9h4cCzsBSvu21b0?_a=BAMClqZW0"}},{"@type":"Comment","text":"","datePublished":"2026-07-28T15:24:33.184Z","url":"https://daily.dev/posts/t4MNzhMSw#c-fXYqZU3Ay","author":{"@type":"Person","name":"Laura Moss","url":"https://daily.dev/lauramoss","image":"https://media.daily.dev/image/upload/s--ILA7G36z--/f_auto/v1780041334/avatars/avatar_4TSk50CCsSpOp4p8ftPwn?_a=BAMAMiWQ0"}},{"@type":"Comment","text":"A 7.5x speedup on the VS Code codebase is hard to ignore. Parallel checking seems like a straightforward win, but I’m curious how the gains hold up in smaller repos and CI runners with fewer cores—that’s where many teams will feel it first.","datePublished":"2026-07-29T04:24:57.680Z","url":"https://daily.dev/posts/t4MNzhMSw#c-2LhdRWczZ","author":{"@type":"Person","name":"Trevor Suna","url":"https://daily.dev/trevorsuna","image":"https://media.daily.dev/image/upload/s--dZ7gXxpp--/f_auto/v1784081551/avatars/avatar_EMoP47rpuw8DNjhp6R1b6?_a=BAMAMicg0"}},{"@type":"Comment","text":"anyone tried this yet on a repo with heavy project references / composite builds? the vscode demo is basically one giant project, curious if the parallel checkers hold up on cross-project incremental builds or if that path still falls back to single threaded.","datePublished":"2026-07-29T18:06:58.035Z","url":"https://daily.dev/posts/t4MNzhMSw#c-O9XDN7kYw","author":{"@type":"Person","name":"PDFops","url":"https://daily.dev/pdfopsdev","image":"https://media.daily.dev/image/upload/s---8isRBKc--/f_auto/v1782922291/avatars/avatar_orjMeK8QKaaVZwGq7ScPz?_a=BAMAMicg0"}}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/typescript-7-is-here-and-it-s-10-faster--t4mnzhmsw#faq","mainEntity":[{"@type":"Question","name":"How much faster is TypeScript 7 than TypeScript 6 at compiling large codebases?","acceptedAnswer":{"@type":"Answer","text":"TypeScript 7 compiles the Visual Studio Code codebase (1.3 million lines, about 8,000 files) in roughly 6.5 seconds versus about 50 seconds for TypeScript 6, a 7.5x speedup. Running four concurrent type checkers on a 16-core machine brings it down to about 4.5 seconds, roughly 10-12x faster, while using about the same memory as the old compiler. Track how typescript 7's compiler speedup could cut CI build times on daily.dev before planning your upgrade."}}]} ```