https://bugs.kde.org/show_bug.cgi?id=359932
--- Comment #11 from Guillaume Maudoux (layus) <layus...@gmail.com> --- Investigations show that okular spends a lot of time in the convert() method. That step produces a QTextDocument from the epub content. More specifically, it spends a lot of time in _cursor->insertHtml() called once for each chapter of the epub, and an equal amount of time in _cursor->insertText() used very stupidly by the algorithm to force a page break. Also, the console output shows that okular repaints all the pages on every redraw, which causes that other 50% of the load time, and causes lag during scrolling. I have attached a first patch to remove the dumb insertion of newline characters to force a new page. The patch also tries to group cursor operations. That being said, my patch does not seem to have that much effect on the load time. -- You are receiving this mail because: You are watching all bug changes.
