Well, there are two implementations already: dart2js and the Dart vm, but this is why TC52's work item #3 is so important: "To develop test suites that may be

Well, there are two implementations already: dart2js and the Dart vm, but this is why TC52's work item #3 is so important: "To develop test suites that may be used to verify the correct implementation of these standards." This way other implementations have an accessible way of testing compliance. I'm not sure if we'll see another JIT'ing VM soon, but I personally hope there's a JVM implementation one day.