crystal Report print timing problem

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SQL-Server-2005

C#2.0

C#

, +

I am devolving a project for a General Store.
There I need to print the bill as and when it is saved to my database.
I am using Crystal Report. But I didn't make it visible. It is printing directly.

My Code is

{
after saving.....
SqlDataAdapter da3 = new SqlDataAdapter("select * from SalesDetails where BillNo='" + textBox1.Text + "'", con);
            DataSet ds3 = new DataSet();
            da3.Fill(ds3, "SalesDetails");
            rptSalesbill abc = new rptSalesbill();
            abc.SetDataSource(ds3.Tables[0]);
            System.Drawing.Printing.PrintDocument printDoc = new System.Drawing.Printing.PrintDocument();
            int i;
            int rawKind = 0;
            for (i = 0; i < printDoc.PrinterSettings.PaperSizes.Count; i++)
            {
                if (printDoc.PrinterSettings.PaperSizes[i].PaperName == "4x1")
                {
                    rawKind = (int)GetField(printDoc.PrinterSettings.PaperSizes[i], "kind");
                }
            }
            abc.PrintOptions.PaperSize = (CrystalDecisions.Shared.PaperSize)rawKind;
            abc.PrintToPrinter(1, true, 0, 0);
}
 private object GetField(Object obj, String fieldName)
        {
            System.Reflection.FieldInfo fi = obj.GetType().GetField(fieldName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
            return fi.GetValue(obj);
        }

But the bill is printing slowly it is taking around 6 secs to print bill.
How can I decrease the time to print.
6 secs is too much for the general store because they have lots of customer in a queue.
Not for the first time! all the time. First time it is taking around 12 secs.
Please please help me I am in a big problem.