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We know people will still need TS 6 for API usage. That's why there's a new `@typescript/typescript6` package that provides - the TypeScript 6 API - a separate `tsc6` binary Install it side-by-side with TypeScript 7, and don't worry about conflicts with `tsc`.

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TypeScript 7 also brings parallelism with new 🧪 experimental 🧪 flags to tweak it. `--checkers` controls the number of type-checking workers, while `--builders` controls concurrent project builds. Use more on powerful machines, or scale down to fewer to control memory usage.

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Under both `--watch` and in the editor, TypeScript 7 also now periodically releases unused type-checking state after enough idle time. For bigger projects, this should help reduce memory usage after peaking.

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TypeScript 7 also ships a new `--watch` mode based on a Go port of Parcel's watcher. This brings more efficient and reliable file watching to TypeScript users across platforms. If you tried earlier versions of TS7, you can expect way less CPU usage on idle with `--watch`.

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With this new version, TypeScript officially supports the language server protocol (LSP). So just pick your favorite editor and enjoy the speed improvements!

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marketplace.visualstudio.com

With TS 7, you'll still have broad editor support. IDEs like Visual Studio and Webstorm will easily support TypeScript 7. For VS Code, we have an extension you can install today! marketplace.visualstudio.com/items?itemNa...

TypeScript 7 - Visual Studio Marketplace

Extension for Visual Studio Code - TypeScript and JavaScript language support powered by the native TypeScript language server.

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TypeScript 7 has all the editor features you love, like auto-imports, find-all-references, expandable hovers, inlay hints, code lenses, linked editing, semantic highlighting, import sorting, and more. They're just a lot faster now.

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The new codebase has been battle-tested by many teams (and entire companies) using it in production for over a year now. In fact, in the editor TypeScript 7 is *more* stable than TypeScript 6, with fewer crashes and lower memory usage.

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The 10x is real for many projects, and the speed improvements make a huge difference for teams at scale. TypeScript 7 drops time in CI, and minimizes delays in editors like VS & VS Code. That makes every part of the developer inner loop feel snappy.

Speedups of various projects between TypeScript 6 and 7

vscode 125.7s to 10.6s -- 11.9x
sentry 139.8s to 15.7s -- 8.9x
bluesky 24.3s to 2.8s -- 8.7x
playwright 12.8s to 1.47s -- 8.7x
tldraw 11.2s to 1.46s -- 7.7x

Memory usage of various projects between TypeScript 6 and 7

vscode 5.2GB to 4.2GB -- -18%
sentry 4.9GB to 4.6GB -- -6%
bluesky 1.8GB to 1.3GB -- -26%
playwright 1.GB to 0.9GB -- -11%
tldraw 0.6GB to 0.5GB -- -15%

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It's simple to get started npm install -D typescript@7 Then run `npx tsc` as usual for a new native experience.

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Visual Studio Code @vscode.dev · 29/06/2026

In case you missed it, TypeScript 7 is a complete 10x faster version of the compiler & language server. It's a full port to parallelized native code. It runs faster, uses less memory, and is more stable than ever before.

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Reposted by TypeScript

⚡ Learn how the VS Code and TypeScript teams collaborated to bring TypeScript 7 to VS Code. The result: faster builds, faster iteration, and a better day-to-day development experience. Read more: code.visualstudio.com/blogs/2026/0...

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Try the RC today! npm install -D typescript@rc Then run `npx tsc` as usual - just faster.

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For teams moving gradually, `tsc` from TypeScript 7 can run side-by-side with the `tsc6` executable & API from TypeScript 6 using the new `@typescript/typescript6` package.

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Speaking of which: TypeScript 7 also brings more parallelism to builds. ℹ️ Some tips ℹ️ `--checkers` controls the number of type-checking workers, while `--builders` controls parallel project-reference builds. Use more on powerful machines, or scale down to fewer to control memory usage.

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Not yet mentioned in the blog post: TypeScript 7.0 will release unused type-checkers in the editor after enough idle time. For bigger projects, this should help reduce memory usage after peaking.

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Editor support has come a long way since we first debuted: auto-imports, expandable hovers, inlay hints, code lenses, JSX linked editing, semantic highlighting, sort imports, remove unused imports, and more are now available.

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The rebuilt `--watch` mode is powered by a Go port of Parcel's watcher, giving TypeScript 7 efficient, stable cross-platform file watching. Expect much less CPU usage on idle.

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What's new in the RC since the beta? A couple of things, but worth calling out are - A rebuilt `--watch` mode - Stability improvements across the board - New ported editor features - Strategies for using less memory in editors

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📣 TypeScript 7's Release Candidate is now out! 📣 The new native rewrite is almost here. Try it out on your codebases, and make sure your team is ready for the upcoming 7.0 release!

Announcing TypeScript 7.0 RC - TypeScript

The Release Candidate for TypeScript 7.0 is now available!

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TypeScript @typescriptlang.org · 19/05/2026

You can try it out on your project by installing our native-preview package from npm. New releases are published daily, and are already used by many teams in production! npmx.dev/package/@typ...

npmx.dev

@typescript/native-preview - npmx

Preview CLI and JS API for the native TypeScript compiler port

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TypeScript @typescriptlang.org · 19/05/2026

Something subtle from @vscode.dev's recent release notes: VS Code core, and all its built-in extensions, are now type-checked with TypeScript 7 native previews! code.visualstudio.com/updates/v1_1...

From the VS Code 1.119 blog post:

Typechecking now uses TypeScript 7 for faster development iteration

Last iteration we moved VS Code's main watch task to use TypeScript 7. This iteration, we finished the migration to use TypeScript 7 for all built-in extensions and core code.

By migrating the Copilot extension to use TypeScript 7, we cut the typechecking time from 22 seconds to 4 seconds. These dramatic speedups enable both developers and agents to iterate more quickly in the VS Code codebase.

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TypeScript @typescriptlang.org · 21/04/2026

TypeScript 7.0 Beta is here! Built on a new native and parallelized foundation, it's already being used on multi-million line codebases. Read up more here and try it on your projects today! devblogs.microsoft.com/typescript/a...

Announcing TypeScript 7.0 Beta - TypeScript

Today we are absolutely thrilled to announce the release of TypeScript 7.0 Beta! If you haven’t been following TypeScript 7.0’s development, this release is significant in that it is built on a comple...

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TypeScript @typescriptlang.org · 23/03/2026

TypeScript 6.0 is now available! This release brings better type-checking for methods, new standard library features, new module features for Node.js, and more! But most important, this release brings us one step closer to the upcoming native-speed 7.0! devblogs.microsoft.com/typescript/a...

Announcing TypeScript 6.0 - TypeScript

TypeScript 6.0 is now available! TypeScript 6 is a stepping-stone release, aligning with the upcoming native-speed 7.0 release.

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TypeScript @typescriptlang.org · 11/02/2026

TypeScript 6.0 beta is now published! This release brings - inference improvements for functions - updates to package.json 'imports' - the Temporal APIs - alignments for the upcoming TypeScript 7.0 - & more! Try it today! devblogs.microsoft.com/typescript/a...

Announcing TypeScript 6.0 Beta - TypeScript

Today we are announcing the beta release of TypeScript 6.0! To get started using the beta, you can get it through npm with the following command: npm install -D typescript@beta TypeScript 6.0 is a uni...

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TypeScript @typescriptlang.org · 05/01/2026

Still reading? Okay, here's the npm link too. go go go go go www.npmjs.com/package/@typ...

npmjs.com

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TypeScript @typescriptlang.org · 05/01/2026

It's the first Monday of 2026! Awful, we know. But have you tried out TypeScript's native previews, or do you hate when your editor and builds are faster?

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TypeScript @typescriptlang.org · 02/12/2025

We've got some updates on TypeScript 7! The new native port - can type-check any project - supports --build and --incremental - has rich editor features implemented - is still 10x faster and is ready for you to try today! devblogs.microsoft.com/typescript/p...

Progress on TypeScript 7 - December 2025 - TypeScript

Earlier this year, the TypeScript team announced that we’ve been porting the compiler and language service to native code to take advantage of better raw performance, memory usage, and parallelism. Th...

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TypeScript @typescriptlang.org · 28/10/2025

Big news in this year's GitHub Octoverse report: TypeScript is now the most-used language on GitHub! We are thrilled and grateful to see the TypeScript and JavaScript community continue to grow and thrive. 🚀 Read up more at github.blog/news-insight...

github.blog

Octoverse: A new developer joins GitHub every second as AI leads TypeScript to #1

In this year’s Octoverse, we uncover how AI, agents, and typed languages are driving the biggest shifts in software development in more than a decade.

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TypeScript @typescriptlang.org · 01/08/2025

TypeScript 5.9 is now available! 📣 This release brings: ✅ An updated tsc --init ✅ Type-checking for the new 'import defer' ✅ Actual summaries in more DOM APIs ✅ Expandable quick info hovers (✨preview✨) and more! Read up more on our blog: devblogs.microsoft.com/typescript/a...

Announcing TypeScript 5.9 - TypeScript

Today we are excited to announce the release of TypeScript 5.9! If you’re not familiar with TypeScript, it’s a language that builds on JavaScript by adding syntax for types. With types, TypeScript mak...

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Reposted by TypeScript

Slack Engineering @slack.engineering · 19/06/2025

Slack now runs the new Go-powered @typescriptlang.org checker in CI. Using the tool saves us over 5 minutes per run, meaning faster merges and happier developers. Huge thanks to Anders, @jakebailey.dev, and everyone else on the project for the incredible performance gains.

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TypeScript @typescriptlang.org · 22/05/2025

Today we're announcing previews of the native port of TypeScript! These nightly previews will be available on npm and the VS Code marketplace! npm install -D @typescript/native-preview npx tsgo --version Read up more on our blog!

Announcing TypeScript Native Previews - TypeScript

Previews of the native TypeScript port are now available on npm and for VS Code through the Visual Studio Marketplace!

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Reposted by TypeScript

Jake Bailey @jakebailey.dev · 06/04/2025

Finally reviving my blog! Wrote a few thousand words about one of the most notorious bugs we encountered when porting tsc to Go: accidental variable shadowing. It's a pleasure to write go/analysis passes, and I was really happy with the results of my shadow analyzer. Please enjoy the CFG diagrams!

jakebailey.dev

Detecting dubious shadowing in Go

The most common porting bug in the TypeScript Go port

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TypeScript @typescriptlang.org · 13/03/2025

Starting soon! 📢 We've got a TypeScript AMA starting in just a few minutes (10am Pacific) on the TypeScript Discord! discord.gg/typescript

discord.gg

Join the TypeScript Community Discord Server!

The official community for TypeScript. Active help channels, type experts and more. Join now! | 49993 members

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Reposted by TypeScript

Syntax @syntax.fm · 11/03/2025

🚨 Announcing the new @typescriptlang.org compiler: native and 10× Faster and written in @golang.org

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TypeScript @typescriptlang.org · 11/03/2025

Watch Anders Hejlsberg demo the incredible progress so far! www.youtube.com/watch?v=pNlq...

youtube.com

A 10x faster TypeScript

YouTube video by Microsoft Developer

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TypeScript @typescriptlang.org · 11/03/2025

Today we're thrilled to announce our effort to port the TypeScript compiler and language service to native code, gaining a 10x speed boost in build times and editor responsiveness! devblogs.microsoft.com/typescript/t...

A 10x Faster TypeScript - TypeScript

Embarking on a native port of the existing TypeScript compiler and toolset to achieve a 10x performance speed-up.

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TypeScript @typescriptlang.org · 28/02/2025

TypeScript 5.8 is now out, with ✅ Better Checks on return expressions ✅ Support for require(esm) in --module nodenext ✅ --libReplacement to speed up program loading ✅ --erasableSyntaxOnly and more! Try it today! devblogs.microsoft.com/typescript/a...