let vs var performance (v3)

Revision 3 of this benchmark created on

Preparation HTML

<script>
  var firstarray = [];
  for (var i = 0; i < 1000; i++) {
    firstarray[i] = Math.floor(Math.random() * 11);
  }
  var secondarray = [];
  for (var i = 0; i < 1000; i++) {
    secondarray[i] = Math.floor(Math.random() * 11);
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
var
var resultarray = [];
for (var i = 0; i < 1000; i++) {
  var firstnumber = firstarray[i];
  var secondnumber = secondarray[i] + 5;
  var total = firstnumber + secondnumber;
  resultarray.push(total);
}
ready
let
var resultarray = [];
for (var i = 0; i < 1000; i++) {
  let firstnumber = firstarray[i];
  let secondnumber = secondarray[i] + 5;
  let total = firstnumber + secondnumber;
  resultarray.push(total);
}
ready

Revisions

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