TypeScript should soonbecome10x faster on average.
However, it can become a real thorn in the side with truly massive codebases.
Hejlsberg stated the obvious when saying that TS isn’t the fastest language.

Although it canlaughablyrun Doom at 0.0000009645 fps.
Programmers must endure long load and check times in their preferred code editors with the current version of TypeScript.
Performance is most important in code editors, as developers spend most of their time there.
The most recent version of TypeScript is 5.8, while Microsoft will release TS 5.9 soon.
Microsoft plans to support both TS 6.x and 7.x until the newer iteration is mature enough.