Speedy for Espruino

The idea behind speedy is slightly different.
forEach is running with one callbackFn only.
Idea is to combine different functions with a default function.
Thats close to your changes to shiftOut.
in this example we combine a simple console.log with pin.set/reset

function fill(){
  arr = [];
  arr.push({callback:en.reset.bind(en)});
  arr.push({callback:console.log.bind(console,"qwertz\n")});
  arr.push({callback:en.set.bind(en)});
  arr.push({callback:console.log.bind(console,"asdf\n")});
  arr.push([1,3,5]);
  arr.push("abc");
}

x = console.log.bind(console,"z:");
function speed(n){
  fill();
  if(!n) n = 100;
  var t = getTime();
  for(var i = 0; i < n; i++) E.speedy(x,arr);
  console.log(getTime() -t);
}

I would not say, this is standard Javascript ;-), it could be helpful, but is it worth it ?