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Aspose stream concatenation takes really long after update

I’ve upgrated my project from aspose pdf kit to aspose pdf and I’ve noticed that concatenating streams takes really a lot of time… if before (for around 1000 pdf files it was taking 3 minutes now we’re arount 15mins)

Are you experiencing this? i’ve noticed as posted in your release note a minor memory usage but times grew up a lot!

Here’s the code i was using (and I use, I’ve just changed the “using”))

MemoryStream[] msArray = new MemoryStream[lotto.Items.Count];
        for (int i = 0; i < lotto.Items.Count; i++)
            LottoItem li = lotto.Items[i];
            strMsg = string.Format("Richiedendo documento {0}", li.Protocollo);
            IDEA.Web.DO.GeneratoreReportistica.Documento doc = null;
            using (DataAccess dataAccess = new DataAccess())
                DataSet ds = dataAccess.GetDocumento(li.Protocollo);
                if (ds != null && ds.Tables != null && ds.Tables[0].Rows.Count > 0)
                    DataRow dr = ds.Tables[0].Rows[0];
                    byte[] bytes = (byte[])dr["CONTENUTO"];
                    doc = new IDEA.Web.DO.GeneratoreReportistica.Documento();
                    doc.BytesDocumento = bytes;
                    doc.FormatoDocumento = GetCheckedString(dr["ESTENSIONE"]);
                    doc.Filename = GetCheckedString(dr["NOME_FILE"]);
            if (doc != null)
                byte[] bytes = doc.BytesDocumento;
                MemoryStream ms = new MemoryStream(bytes, 0, bytes.Length);
                msArray[i] = ms;
                // lstPdf.Add(doc.BytesDocumento);
                strMsg = string.Format("Salvato in memoria documento {0}", li.Protocollo);
        string str = string.Format("Tempo impiegato per leggere i dati del lotto {0} : {1} ms", lotto.IDLotto, sw.ElapsedMilliseconds);
            PdfFileEditor editor = new PdfFileEditor();
            editor.Concatenate(msArray, fileStream);
            PdfFileInfo fileInfo = new PdfFileInfo(fileOutPut);
            count = fileInfo.NumberOfPages;
        catch (Exception ex)
            return 0;
            foreach (var ms in msArray)
                //ms = null;

What can I verify?

I've attached a simple project... it was pointing to c:\temp\test.pdf, I've copied the file I used and renamed and it's yours...

on my machine with pdf and my real file takes

2min 35sec with KIT
24 min with PDF

with your file (7 file per page, mine was 16) takes

0:27 with KIT

2min 05 with PDF (7.1)

Can you please investigate?

Hi Paolo,

Thanks for using our products.

We are working over this query and will get back to you soon. We are sorry for your inconvenience.

Hi Paolo,

have tested the scenario and I am able to reproduce the same problem. For the
sake of correction, I have logged it in our issue tracking system as
PDFNEWNET-34104. We will investigate this
issue in details and will keep you updated on the status of a correction.

We apologize for your inconvenience.

The issues you have found earlier (filed as PDFNEWNET-34104) have been fixed in Aspose.Pdf for .NET 7.5.0.

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