Well it does suck, and it isn't really great for implementing performant developer tools, such as parsers, formatters and so on.
The performance is that bad that the typescript developers are rewriting the language itself in Go. [0]
Tells me everything I need to know about how bad typescript is from a performance stand point.
[0] https://devblogs.microsoft.com/typescript/typescript-native-...
The performance is so bad that the most used software in the world is written using it.
That’s the lsp not runtime. Bun runs Typescript very fast. It’s a fantastic language and ecosystem.