Thanks for your inquiry. Please
note that Aspose.Words requires TrueType fonts when rendering documents
to fixed-page formats (PDF, XPS or SWF) or getting page count. Make sure you have all the
Fonts installed on your machine you’re using to convert Word document to
PDF format. I would suggest you please read the following articles:
If you still face problem, please share the fonts used in your document here for investigation purposes.
Regarding performance issue, please note that performance and memory usage all depend on complexity
and size of the documents you are generating. While rendering a document to fixed page formats (e.g. PDF or getting page count
), Aspose.Words needs to build two model in the memory – one for document and the other for rendered document.
The process of building layout model is
not linear; it may take a minute to render one page and may take a few
seconds to render 100 pages. Also, Aspose.Words has to create APS (Aspose Page Specification
model in memory and this may again eat some more time for some
documents. Rest assured, we’re always working on improving performance;
but, rendering will be always running slower than simple saving to flow
formats (e.g doc/docx).