Google Closure is what I'm talking about too. However, it's important to know _which_ Google Closure, as there are a number of components. It seems that the c

Google Closure is what I'm talking about too. However, it's important to know _which_ Google Closure, as there are a number of components. It seems that the component most used in ClojureScript is the JavaScript optimizer, which is most likely just run as a post-processing step. Of course, ClojureScript could also be using the Closure Library within the code, which would integrate Closure deeper into the system.