using (PsqlConnection connection = CreateConnection())
        {
            using (PsqlCommand command = CreateCommand())
            {
                command.Connection.Open();
                DateTime now = DateTime.Now;
                for (int i = 0; i < 10000; i++)
                {
                    command.ExecuteReader().Close();
                }
                sb.AppendLine("pervasive   : " + (now - DateTime.Now).ToString());
                command.Connection.Close();
            }
        }
        using (SqlConnection connection = CreateConnection1())
        {
            using (SqlCommand command = CreateCommand1())
            {
                command.Connection.Open();
                DateTime now = DateTime.Now;
                for (int i = 0; i < 10000; i++)
                {
                    command.ExecuteReader().Close();
                }
                sb.AppendLine("mssql   : " + (now - DateTime.Now).ToString());
                command.Connection.Close();
            }
        }