Performance analyze ADO.NET and Entity Framework

Which one gives better performance? ADO.NET or Entity Framework.

These are the two method I want to analyze.

ADO.NET Test Method

public void ADOTest()
{
    Stopwatch stopwatch = Stopwatch.StartNew();
    using (SqlConnection con = new SqlConnection(connection))
    {
        string Query = "select * from Product ";
        SqlDataAdapter da = new SqlDataAdapter(Query, con);
        DataSet ds = new DataSet();
        con.Open();
        da.Fill(ds);
        DataView dv = ds.Tables[0].DefaultView;
    }
    stopwatch.Stop();
    Console.WriteLine("ADO.NET Time Elapsed={0}", stopwatch.Elapsed);
}

Entity Framework Test Method

public void EFTest()
{
    Stopwatch stopwatch = Stopwatch.StartNew();
    var list = _OnlineStoreEntities.Products.ToList();
    stopwatch.Stop();
    Console.WriteLine("Entity Framework Elapsed={0}", stopwatch.Elapsed);
}

Result in first time execution

When I ran this above method in more than 100 times. The average execution time is shown in the image:

ADO.NET took only 2 milliseconds whether Entity Framework took more than 4 milliseconds.

Result in second time execution

When I ran this method again and again in single run. The average execution time between ADO.NET and EF is not much more:

Question

1. I think EF gives very worst performance in first time execution Then why we use EF?
2. Why EF second time execution was faster than first time execution?