[okular] [Bug 390971] Delayed content rendering during scrolling on a hidpi screen

[Henrik Fehlauer]

https://bugs.kde.org/show_bug.cgi?id=390971

--- Comment #3 from Henrik Fehlauer <rkflx at lab12.net> ---
Hmh, cannot reproduce. I tried exactly the versions of Okular and Poppler as
well as the settings you mentioned, but there is absolutely no difference at
all between HiDPI and normal scaling, and even on my slow machine I don't have
such a huge delay.

+1 for showing the system load applet in your video, this way we see you are
not running out of RAM, so that's not the culprit.

I tried on a FullHD screen, but your screen resolution would be interesting to
know as well (looks like 4K?).

Also, how do you scroll exactly? Keyboard, mouse, touchpad?

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