Free Support Forum -


I've seen this discussed before.

I have some pdf's that are not that complex and even after optimizing them they convert extremely slowly with Pdfkit. Attached is two versions of the same document. This single-paged pdf takes approx 40 seconds to convert and it consumes all it can get from my CPU. Just tested setting the resolution to 300 and it resulted in taking several minutes.

Win7 x64 - 8Gb RAM (.Net 4).

Dim myStartTime As DateTime = Now()

Dim myConverter As New Aspose.Pdf.Kit.PdfConverter()


myConverter.StartPage = 1

myConverter.EndPage = 1


myConverter.GetNextImage("c:\temp\img10.jpeg", System.Drawing.Imaging.ImageFormat.Jpeg)


Dim myEndTime As DateTime = Now()

Dim myTimespan As TimeSpan = myEndTime.Subtract(myStartTime)


Hi Stein,

I have noticed the slow performance at my end too and logged this issue as PDFKITNET-22256 in our issue tracking system. Our team will investigate it in detail and you’ll be updated with the results and the resolution accordingly.

We’re sorry for the inconvenience.

Any progress?

Hi Stein,

I’m sorry to share with you that this issue is not yet resolved. Our team is looking into this issue and I have asked the team to share the ETA. You’ll be updated with the status the earliest possible.

We’re sorry for the inconvenience.

Hi Stein,

Our team has investigated this issue in detail and I would like to inform you that the fix for this issue will be available at the end of February or early March 2011.

We’re sorry for the inconvenience. If you have any further questions, please do let us know.

I really hope you can speed up this as we've already purchased Asp.Total and are using it in a production-environment. Even though we're using async calls so the application isn't totally dead the whole server is performing noticably slower while it is finishing rendering the pdf to jpg.

I have a couple of other outstanding posts as well (will ask for an ETA for those now).

Hi Stein,

Our team tries the best to resolve any issues as soon as possible. However, I’m afraid, due to certain technical difficulties some issues might take a little longer. We’ll try to provide you the fix the earliest possible.

We’re sorry for the inconvenience.

Hi Guys,
we are having the same issue when convert Tiff to PDF and compress PDF .
Is there any solucion? We are using aspose.pdf-20.4


Would you please try using latest version of the API i.e. 20.7 and in case you still notice any performance issue, please share your sample input file along with code snippet. We will test the scenario in our environment and address it accordingly.