Well, I think you need to look at the intended use cases for transit. On the browser, transit serialisation is faster than binary precisely because it uses the

Well, I think you need to look at the intended use cases for transit. On the browser, transit serialisation is faster than binary precisely because it uses the fast paths. For server to server communication, it can use msgpack. There's also a) it's fully schemaless and b) you can add new primitives. Which you may or may not need. But if you're looking for something that does a) and b) while being fast for browser communication, transit's currently your best option.