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This really shows that there is a lot of potential for a native tsc alternative (like the one that was on the front page recently) to shine in terms of performance

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I think it shows a lot of potential to turn TypeScript to what C++ has become.

Unlikely, types intentionally cannot affect the emitted JavaScript. You can always get raw JavaScript from TypeScript code by blindly erasing the type annotations (and transforming a few special syntaxes).

I just remembered this blog post, maybe that's the one that was on the front page recently ?

https://kdy1.dev/posts/2022/1/tsc-go

Ok yup, definitely that one, https://news.ycombinator.com/item?id=30074414

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