[virtualwhys]

ScalaJS is still in its infancy, I wouldn't expect miracles at this point, particularly in terms of generated JS file size. Note the _experimental_ disclaimer in ScalaJS' home page: http://www.scala-js.org

Assume optimizations will come with time, for now it's pretty cool that one can work in a more or less completely type safe environment on both client and server with Scala.

p.s. muddling along with Coffeescript + GruntJS for the time being, but look forward to working in pure Scala once the library stabilizes.

[sixbrx]

Yeah this is a great effort that will have a really big upside for developers like me using Play! framework. It means I can define my transfer types in Scala and share them between client and server in a typesafe way. Currently that takes lots of testing to keep the javascript side honest in what it's sending.