tests/html/pair_iterable_perf.html

<!doctype html>
<meta charset="utf-8">
<title>Value and pair iterable bindings</title>
<script>
  // Requires passing --pref=dom.testbinding.enabled to Servo binary
  function collect(iter) {
    var collection = [];
    for (element of iter) {
      collection.push(element);
    }
    return collection;
  }

  function measure_time(func) {
    var start = performance.now();
    func();
    var stop = performance.now();

    return (stop - start) / 1000.0;
  };

  const ENTRY_COUNT = 10000;
  const RUN_COUNT = 10;

  var benchMe = function() {
    var t = new TestBindingPairIterable();

    for (var i = 0; i < ENTRY_COUNT; i++) {
      t.add(i.toString(), i);
    }

    var result = collect(t.entries());
  };

  var avg = 0;
  for (var i = 0; i < RUN_COUNT; i++) {
    var time = measure_time(benchMe);
    avg += time;
  }
  avg /= RUN_COUNT;

  console.log('Average running time across ' + RUN_COUNT + ' runs: ' + avg);

</script>