Okular renders some pdfs much slower than Evince, even though both use Poppler for the pdf backend. Apparently, this is because Evince uses the cairo backend of Poppler, while Okular must use splash. For example, the second page of this pdf https://arxiv.org/pdf/1701.07837v2 takes over 3 seconds for Okular to render. However, Evince renders it almost instantly. Or when quickly scrolling through a large pdf, Evince seems to render the pages almost instantly, while Okular renders slower than I can (quickly) scroll. Here is an example large pdf: https://arxiv.org/pdf/1508.02595v4 I'm using Okular 1.3.3, Evince 3.26.0, and poppler 0.61.1 on Archlinux (with an Intel i7-3720QM @ 2.6GHz). I initially submitted this bug at https://bugs.kde.org/show_bug.cgi?id=391972 bug was asked to submit it here instead. I apologize if this bug is considered to be a duplicate of some similar bugs: https://bugs.freedesktop.org/show_bug.cgi?id=23991 https://bugs.freedesktop.org/show_bug.cgi?id=78728 https://bugs.freedesktop.org/show_bug.cgi?id=81211
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