Slight correction to Jake—we *kind of* don't just watch the current directory only; if we encounter files outside the workspace, we will request to watch those directories too. I say "kind of" because VS Code seems to ignore those requests, and I haven't figured out whose bug that is.
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...
Thanks for the good investigations and profiling!
Are you in a monorepo by any chance?
Yeah, this is about where it interacts with your project, not necessarily about where the model lives—local uses the workspace in the window, background uses a git work tree (I think) to run in a background process, and cloud works on branch on github.com, basically
What you’re describing is a restriction under `composite`
Finished two retrospective blog posts on the journey of require(esm) before 2025 ends:
joyeecheung.github.io/blog/2025/12...
joyeecheung.github.io/blog/2025/12...
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...
![Benchmark 1: node ./node_modules/typescript/lib/tsc.js -b . -f
Time (mean ± σ): 4.204 s ± 0.057 s [User: 6.437 s, System: 0.533 s]
Range (min … max): 4.142 s … 4.305 s 10 runs
Benchmark 2: /home/jabaile/work/TypeScript-go/built/local/tsgo -b . -f
Time (mean ± σ): 377.8 ms ± 8.1 ms [User: 2827.7 ms, System: 453.3 ms]
Range (min … max): 361.4 ms … 387.1 ms 10 runs
Summary
/home/jabaile/work/TypeScript-go/built/local/tsgo -b . -f ran
11.13 ± 0.28 times faster than node ./node_modules/typescript/lib/tsc.js -b . -f
Benchmark 1: node ./node_modules/typescript/lib/tsc.js -b .
Time (mean ± σ): 1.247 s ± 0.016 s [User: 1.859 s, System: 0.252 s]
Range (min … max): 1.232 s … 1.284 s 10 runs
Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options.
Benchmark 2: /home/jabaile/work/TypeScript-go/built/local/tsgo -b .
Time (mean ± σ): 120.6 ms ± 9.5 ms [User: 843.1 ms, System: 207.4 ms]
Range (min … max): 111.8 ms … 156.0 ms 24 runs
Summary
/home/jabaile/work/TypeScript-go/built/local/tsgo -b . ran
10.34 ± 0.82 times faster than node ./node_modules/typescript/lib/tsc.js -b .](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4eukmtg5kmyjmp6qw3xkpite/bafkreiblwmloicbfxjk2mdcn5vo42ahkhxr3xi6oxb5a6ypr2vxxb7qdqq)
Benchmark 1: node ./node_modules/typescript/lib/tsc.js -b . -f Time (mean ± σ): 4.204 s ± 0.057 s [User: 6.437 s, System: 0.533 s] Range (min … max): 4.142 s … 4.305 s 10 runs Benchmark 2: /home/jabaile/work/TypeScript-go/built/local/tsgo -b . -f Time (mean ± σ): 377.8 ms ± 8.1 ms [User: 2827.7 ms, System: 453.3 ms] Range (min … max): 361.4 ms … 387.1 ms 10 runs Summary /home/jabaile/work/TypeScript-go/built/local/tsgo -b . -f ran 11.13 ± 0.28 times faster than node ./node_modules/typescript/lib/tsc.js -b . -f Benchmark 1: node ./node_modules/typescript/lib/tsc.js -b . Time (mean ± σ): 1.247 s ± 0.016 s [User: 1.859 s, System: 0.252 s] Range (min … max): 1.232 s … 1.284 s 10 runs Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs. It might help to use the '--warmup' or '--prepare' options. Benchmark 2: /home/jabaile/work/TypeScript-go/built/local/tsgo -b . Time (mean ± σ): 120.6 ms ± 9.5 ms [User: 843.1 ms, System: 207.4 ms] Range (min … max): 111.8 ms … 156.0 ms 24 runs Summary /home/jabaile/work/TypeScript-go/built/local/tsgo -b . ran 10.34 ± 0.82 times faster than node ./node_modules/typescript/lib/tsc.js -b .
Tonight will be one of the best nightlies of the TypeScript Native Preview ever.
1) @andrewbran.ch fully rewrote the language server infra into a snapshot model. No more data races. It's so cool
2) Sheetal added build mode (-b), and it's even _concurrent_ build mode. 10x+ on dt-tools, hot and cold
Any packages that only resolve via “import” condition are going to be broken until github.com/microsoft/ty... is in
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!
It does that only to issue a diagnostic message that says (paraphrased): “this didn’t work, but it *would* work if you update your moduleResolution settings, sure you don’t want to do that?”
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...
It hasn't happened yet (merging today!!!), but I wrote a big ol blog post on the giant migration of DefinitelyTyped to a @pnpm.bsky.social monorepo! I am super excited for this. Again thank you @andrewbran.ch, Nathan, @zkochan.bsky.social and everyone else.
jakebailey.dev/posts/pnpm-d...
Screen shot of the WIP PR to DefinitelyTyped which will convert it into a pnpm monorepo
Next week is gonna be a fun week
Soon the scourge of baseUrl, paths, and typesRoot will be purged, replaced with "how about we actually use node_modules like everyone else"
(thank you Andrew and Nathan for your efforts, and of course @zkochan.bsky.social and contributors for pnpm)
Except bicyclists doing a rolling stop, those guys must go straight to jail
The Release Candidate of TypeScript 5.2 is now out to try! Test it out and let us know if you run into any issues!
We just released TypeScript 5.2 Beta! Check out
- 'using' Declarations
- Decorator Metadata
- Easier Tuple Type Notation
- Inline Variable Refactoring
- Comma Completions in Objects
and more! Try it today!