Aspose PDF 2025 is over 100x slower than Aspose 2019

Aspose.PDF Product Family
1

While upgrading a program from Aspose 2019 to the latest Aspose 2025, we discovered that the new version is over 100 times slower at certain operations. Specifically, adding pages in the middle of the document. A function that takes 10 seconds in Aspose 2019.4 takes over 4,000 seconds in the latest versions.

TestAsposeSpeed.zip (959 Bytes)

I have attached sample code (60 lines of VB.Net code). I have not included my 2019 and 2025 license files. Let me know if you need those as well. We have paid support but want to start here.

The sample code creates a 5000 page PDF by appending blank pages to the end. This is fast.

Then the program inserts 5000 blank pages in the middle of the PDF. This is the problem.

In Aspose 2019.4, this is fast.
In latest Aspose, this takes hours.

2

@Robert343

Hello,

Thank you for reaching out regarding your performance concerns with Aspose.Slides. Here’s how we can assist you with paid support:

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