Perforance test of basic set operations in dart

gistfile1.dart

void runTests(Set<String> se, List<String> data) {
  Stopwatch w = new Stopwatch();
  w.start();
  for (String s in data) {
    se.add(s);
  }
  print("Add: ${w.elapsedInMs()} ms.");
  num i = 0;
  w.reset();
  for (String s in data) {
    if (se.contains(s)) {
      i+= s.length;
    }
  }
  print("Contains: ${w.elapsedInMs()} ms.");
  w.reset();
  for (String s in se) {
      i+= s.length;
  }
  print("Iterate: ${w.elapsedInMs()} ms.");
  w.reset();
  for (String s in data) {
    se.remove(s);
  }
  print("Remove: ${w.elapsedInMs()} ms.");
  w.reset();
  data.sort(compare(String a, String b) {
    return a.compareTo(b);
  });
  print("Sort list: ${w.elapsedInMs()} ms.");
}

void main() {
  List<String> data = new List<String>();
  for (int i=0; i<500000; i++) {
    String s = "${Math.random()}";
    data.add(s);
  }
  runTests(new HashSet<String>(), data);