Comment 1 for bug 1658578

Loading flow happens whenever the internal HTML file being displayed is
changed, the new HTML file has to be rendered and laid out. That remains
the same in all versions of the viewer. If you are saying that the
amount of time taken for each individual loading flow has increased,
then it is likely because of a change to how the html is loaded which is
necessary for security reasons -- nothing I can do to fix that. Although
I have to say that I can see no increase in time for each loading flow
(it remains imperceptible) on, for example, War and Peace.