Coffescript is really nice. We migrated a 3k javascript app to a 2.5k coffeescript one (lots of it automatically with an app specific script). We gained perform

Coffescript is really nice. We migrated a 3k javascript app to a 2.5k coffeescript one (lots of it automatically with an app specific script). We gained performance, we are much happier with our gui code now. Proper classes, generators, terser closures, ruby-like removal of inferable parenthesis, and lack of ';' is a big win.