JSFiddle - React, Tailwind, and code Playground

by Dogbert

HTML

<script src="http://google.github.io/traceur-compiler/bin/traceur.js"></script>
<script src="http://google.github.io/traceur-compiler/src/bootstrap.js"></script>
<script type="module">
    

    function* sup(n) {
  for(var i = 1; i < n; i++) {
    yield i;
  }
}
    
    function count(nn) {
start = +new Date
var sum = 0
for(var n of sup(nn)) {
  sum += n
}
    console.log({nn:nn, sum:sum, time:(+new Date - start)});
return sum;
   }
    
    count(4000000)
</script>