[bostonOU]

I believe ClojureScript only supports boolean type hints/performance optimization. Other type hints are "supported" but don't do anything.

[Skinney]

Yeah. They are not really necessary in a Javascript VM that is optimized for these sort of languages anyway.

[swannodette]

This is not entirely accurate, the ClojureScript compiler actually internally propagates type information for further optimization. And nothing precludes a Typed ClojureScript which feeds even more information to the compiler.