when generate 10000 2d matrix bar code take too much time

Question

Problem

When generating matrix 2d bar code it take per 10000 files matrix bar code generating it take 1 minute

so that how to generating matrix bar code 2d in less time as seconds .

my code as below under button generating :

 

Class1 CLS = new Class1();
                DataTable dt = CLS.ShowalldataSerial(textBox4.Text);

                for (int i = 0; i <= Convert.ToInt32(textBox1.Text); i++)
                {
                    Serial = SRL.Rnd().ToString();
                    txt = "UserID" + dt.Rows[0][0] + "FirmName" + dt.Rows[0][1] + "OrderNo" + dt.Rows[0][2] + "BtachNo" + dt.Rows[0][3] + "Quantity" + dt.Rows[0][4] + "ProductName" + dt.Rows[0][5] + "SerialNo" + Serial;

                    dm.DM(txt, Color.FromName(comboBox1.SelectedItem.ToString()), Color.White).Save(root + "\\" + Serial + ".emf", System.Drawing.Imaging.ImageFormat.Emf);

                }

                MessageBox.Show("Records generated success ");