Poor performance converting PDF pages to image

Hi,

We are looking for a toolkit that can convert PDF pages to an image.
So we did some tests with different toolkits including Aspose.Pdf (we have an Aspose.Total license)

We looked at the performance and quality of the conversion (if the resulting image was correct).
These are the results:

Toolkit      Time        Correct (of 30 documents)
Aspose       109s        27
PDF4Net      81s         21
Atalasoft    55s         27
GdPicture    61s         27
Gnostice     248s        16
ceTeSoftware 29s         30
PDF Tron     48s         27

As you can see the quality of the Aspose conversion is good (good enough for us): only 3 of 30 documents were converted incorrectly of which 2 were only small color errors.

The performance of Aspose.Pdf is however poor. It also seems to use a lot of memory during conversion; much more than the other toolkits.

Questions:

1. do you think it is possible to improve the speed of the conversion or is there no room for improvement due to the way the toolkit was build?
2. do you have plans to improve the speed and memory consumption in the near future?

Thank you and best regards,

Corné