In swift's case it's a single threaded frontend that is fairly inefficient: https://github.com/apple/swift/blob/main/docs/CompilerPerformance.md https://github.

In swift's case it's a single threaded frontend that is fairly inefficient: https://github.com/apple/swift/blob/main/docs/CompilerPerformance.md https://github.com/apple/swift/blob/main/docs/CompilerPerfor...