TextFragmentCollection of Aspose.Pdf is taking too much time

Question

I am using Aspose.Pdf to find and replace text in a Pdf File. If a Pdf File has 10 words to find and replace then it is taking 2 to 3 minute. But if a Pdf File has 80 words(10 words are repeating 8 times on the File) then it is taking 20 to 25 minutes in Finding and replacing text on a Pdf File. I am using the below code. Please suggest me what the changes i will make in my code that it will take minimum time.

private void PrintPdfDocument(object FileNameSource, DataTable dt)
{
object fileNameSource = FileNameSource;
object fileName = System.IO.Path.GetDirectoryName(System.IO.Path.GetTempPath()) + "\\" + DateTime.Now.Ticks.ToString() + ".pdf";
File.Copy(fileNameSource.ToString(), fileName.ToString(), false);
pdfDocument = new Document(FileNameSource.ToString());
try
{
TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber("@color_arabic");
pdfDocument.Pages.Accept(textFragmentAbsorber);
TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = txtColorArabic.Text.ToString().Trim();
}
textFragmentAbsorber = new TextFragmentAbsorber("@color_english");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = txtColorEnglish.Text.Trim();
}
textFragmentAbsorber = new TextFragmentAbsorber("@unit_arabic");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = ConvertNumeralsToArabic(txt_ArabicUnit.Text.ToString());
}
textFragmentAbsorber = new TextFragmentAbsorber("@unit_english");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = txtUnitEnglish.Text.ToString().Trim();
}
textFragmentAbsorber = new TextFragmentAbsorber("@mfg_arabic");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = ConvertNumeralsToArabic(dt.Rows[0]["ProdDate"].ToString());
}
textFragmentAbsorber = new TextFragmentAbsorber("@mfg_english");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = dt.Rows[0]["ProdDate"].ToString().Trim();
}
textFragmentAbsorber = new TextFragmentAbsorber("@exp_arabic");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
string expArabic = dt.Rows[0]["ExpDate"].ToString();
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = ConvertNumeralsToArabic(dt.Rows[0]["ExpDate"].ToString());
}
textFragmentAbsorber = new TextFragmentAbsorber("@exp_english");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = dt.Rows[0]["ExpDate"].ToString().Trim();
}
if ((dt.Rows[0]["InventBatchId"].ToString().Trim().Contains("B")) &&
(dt.Rows[0]["InventBatchId"].ToString().Trim().Substring(0, 1) == "B"))
{
textFragmentAbsorber = new TextFragmentAbsorber("@bch_arabic");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = ConvertNumeralsToArabic(dt.Rows[0]["InventBatchId"].ToString().Trim().Substring(1).Replace("-", ""));
}
textFragmentAbsorber = new TextFragmentAbsorber("@bch_english");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = dt.Rows[0]["InventBatchId"].ToString().Trim().Substring(1).Replace("-", "");
}
}
else
{
textFragmentAbsorber = new TextFragmentAbsorber("@bch_arabic");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = ConvertNumeralsToArabic(dt.Rows[0]["InventBatchId"].ToString().Trim());
}
textFragmentAbsorber = new TextFragmentAbsorber("@bch_english");
pdfDocument.Pages.Accept(textFragmentAbsorber);
textFragmentCollection = textFragmentAbsorber.TextFragments;
foreach (TextFragment textFragment in textFragmentCollection)
{
textFragment.Text = dt.Rows[0]["InventBatchId"].ToString().Trim();
}
}
pdfDocument.Save(@fileName.ToString());
}