How to make Numbers iterable as quick as possible

iterableNumber.js

// Shortest (96 chars):
Number.prototype[Symbol.iterator]=function(){let i=0;return{next:()=>({done:i>this,value:i++})}}

// Only return value if not done yet (112 chars):
Number.prototype[Symbol.iterator]=function(){let i=0;return{next:()=>({done:i>this,...!(i>this)&&{value:i++}})}}

// Readable:
Number.prototype[Symbol.iterator] = function() {
  let i = 0;

  const isDone = i > this;
  const nextValue = i++;
  const getNext = () => ({ value: nextValue, done: isDone });

  return { next: getNext }
}