Java hashset perf test

gistfile1.java

private static void runTests(HashSet<String> se, List<String> data) {
	Stopwatch stopWatch = new Stopwatch().start();
	for (String s : data) {
		se.add(s);
	}
	System.out.println("Add:" +  stopWatch.elapsedMillis() + " ms.");
	int i = 0;
	stopWatch.reset().start();
	for (String s : data) {
		if (se.contains(s)) {
			i+= s.length();
		}
	}
	System.out.println("Contains:" + stopWatch.elapsedMillis() + " ms.");
	stopWatch.reset().start();
	for (String s : se) {
		i+= s.length();
	}
	System.out.println("Iterate: " + stopWatch.elapsedMillis() + " ms.");
	stopWatch.reset().start();
	for (String s : data) {
		se.remove(s);
	}
	System.out.println("Remove: " + stopWatch.elapsedMillis() + " ms.");
	stopWatch.reset().start();
	Collections.sort(data);
	System.out.println("Sort list: " + stopWatch.elapsedMillis() + " ms.");
}
/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
	  List<String> data = new ArrayList<String>();
	  for (int i=0; i<500000; i++) {
	    String s = String.valueOf(Math.random());
	    data.add(s);
	  }
	  runTests(new HashSet<String>(), data);