Low speed of PDF parsing with GroupDocs

Hello Dear ASPOSE team,

As we know GroupDocs is your member. So, please, help us to solve the issue in GroupDocs PDF viewer library. GroupDocs memebers said that the issue is in your library.

We are waiting for solving from 22/07/2014.... You can find the original description here: http://groupdocs.com/Community/forums/permalink/1812/1981/showthread.aspx#1981

We have very low speed with some sort of pdf files. We created 3 files with the same contents. We can reproduce the very slow speed with one of them. 2 of  these files have been created using ABBYY FineReader 11, but on different computers. 1 of of  these files have been created using PDF-XChange. Link to files: https://mega.co.nz/#F!T5pQjb7D!-ncWcNYe-uViRuVfi8oTwQ

"TestDocument 5.pdf" - very slow (11 seconds per page) ABBYY FineReader 11 on PC1
"TestDocument 4.pdf" - normal (4 seconds per page) ABBYY FineReader 11 on PC2
"TestDocument 3.pdf" - normal (5 seconds per page) PDF-XChange

Please, look at "TestDocument 5.pdf. In our opinion the problem is in this file...

Please, help us! Thank you!