Originally Posted by murg
This explains why I don't have the slow page turn bug.
My ePubs are split into chapters.
Yes, this help, but this is not the whole story.
It doesent matter how small the single html file are in an epub, in my experience event an optimized epub will always be slower than an kepub.
Maybe that the kepub contain some kind of structural information that help the Kobo to render the page faster...