Peformance problem observed here too - just creating a disc project from the sample movie project, adding a simple main & sub menu pair, then exporting as a DVD image.
Issue seems to be extremely slow rendering coupled with extremely high GPU usage during export of any parts involving titles (IMO GPU usage is excessively high considering the (lack of) complexity of what was actually being exported):
- Exporting the disc menus
- Exporting any parts of the movie containing full-screen or overlay titles
Other parts of the movie (having no titles) export quickly. And, once the rendering stage is completed, creating the disc image itself is also quick.
Regards,
Richard