Right, but the great thing about a compiled language like Dart is that it can detect at compile-time which modules aren't being used and then exclude those from the js output. Except, it doesn't seem to ever do that.

EDIT: Well, technically, Dart is actually designed to be interpreted (or JIT compiled, or what have you) by the Dart VM, so calling it a "compiled language" was incorrect on my part. However, dart2js is a compiler, so, it should be doing compiler-y shit.