[Poppler-bugs] [Bug 105827] New: slash slower than cairo at rendering a pdf

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105827

            Bug ID: 105827
           Summary: slash slower than cairo at rendering a pdf
           Product: poppler
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: splash backend
          Assignee: poppler-bugs at lists.freedesktop.org
          Reporter: kjslag at gmail.com

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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