Optimizing building trees from a database

using System;
using System.Data;
using System.IO;
using System.Xml;
using BuildingTrees;

namespace DemoApp
{
	class Class1
	{
    [STAThread]
    static void Main(string[] args)
    {
      if (File.Exists("tree.xml"))
      {
        Console.WriteLine("Starting the test...");
        for (int i = 0; i < 5; i++)
          StartTest(LoadData());
        Console.WriteLine("Press enter to continue...");
        Console.ReadLine();
      }
		}

    private static void StartTest(DataView data)
    {
      // Setup the timer
      double slowResult = 0;
      double fastResult = 0;
      Win32.HiPerfTimer timer = new Win32.HiPerfTimer();

      // Test the SlowTree
      SlowTree slowTree = new SlowTree();
      timer.Start();
      TreeNode slowRoot = slowTree.LoadTree(data);
      timer.Stop();
      slowResult = timer.Duration;

      // Test the FastTree
      FastTree fastTree = new FastTree();
      timer.Start();
      TreeNode fastRoot = fastTree.LoadTree(data);
      timer.Stop();
      fastResult = timer.Duration;
      
      // Show the results
      Console.WriteLine("SlowTree: {0}", slowResult);
      Console.WriteLine("FastTree: {0}", fastResult);
    }

    private static DataView LoadData()
    {
      DataSet dataSet = new DataSet();
      dataSet.ReadXml("tree.xml");
      return dataSet.Tables[0].DefaultView;
    }
	}
}