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1
Vote

PdfLoadedDocument Save method performance is slow

Hello!
I'm trying to convert PDF to A1B standard and it takes ~7 minutes to process. I take HttpPostedFile InputStream as the input (fileStream) and try to convert is as follows:

public Stream ConvertStream(Stream fileStream)

{

    var convertedDocument = new PdfLoadedDocument(fileStream) {Conformance = PdfConformanceLevel.Pdf_A1B};

    using var stream = new MemoryStream();

   

convertedDocument
.Save(stream);

   

convertedDocument
.Close(true);

    return stream;

}


The PDF in question can be located here: 

https://cartographicperspectives.org/index.php/journal/article/view/cp29-full/pdf

I've tried to take other similar size PDFs - it was noticeably faster.