It sounds like you think "tsc is slow" because "it uses shared state". If that is what you're getting at, you've connected two unconnected statements. It does

It sounds like you think "tsc is slow" because "it uses shared state". If that is what you're getting at, you've connected two unconnected statements. It does tend to imply the new tsc isn't going to be able to take much more advantage of concurrency than the current one, which may put a limit on what performance gains it can expect. I don't know if the current tsc is able to do anything concurrently. (Here, "concurrently" doesn't merely mean "able to have multiple events in flight and thus do multiple tasks at the same 'time'" but truly "doing work on multiple CPUs simultaneously".) Go is generally faster than Node, but it'll be hard to guess by how much in this case. A Rust port would be harder but would probably lead on in a direction to improve the concurrency. However, that may be an infeasible amount of work, not because of Rust per se but because a port is intrinsically easier than a port and a rearchitecting.