TypeScript 7 RC: the compiler rewritten in Go, around 10x faster (opens in new tab)

Microsoft just shipped the Release Candidate for TypeScript 7, with the stable release expected next month. And the big deal, for once, isn't a new syntax or yet another config flag. It's that the entire compiler has been rewritten in Go. Over the past year, the team ported the existing codebase (until now, TypeScript that compiled to JavaScript) to Go. It was done methodically from the current implementation, not rewritten from scratch, so the type-checking logic stays structurally identical...