10s or the User Guide fon this W7-64 laptop, i7, 4GB. Rather longer if Sigil had not been run before in the same session. The same whether Clean Source was enabled or not.
Another, much longer, epub (a scholarly tome on "Dracula") opened almost instantly. Because it contained few links?
Last edited by exaltedwombat; 03-03-2013 at 09:33 AM.