I don't think GP was referring to transpilation speed when they wrote "most advanced type system known to mankind".
The original poster was referring to the golang port of TypeScript which was done almost exclusively for performance reasons. They weren’t just making an unprompted comparison of two type systems.
alt Hacker News
The original poster was referring to the golang port of TypeScript which was done almost exclusively for performance reasons. They weren’t just making an unprompted comparison of two type systems.