[okular] [Bug 457228] New: Okular is very slow when loading files from sshfs mounts

[Massimiliano L]

https://bugs.kde.org/show_bug.cgi?id=457228

            Bug ID: 457228
           Summary: Okular is very slow when loading files from sshfs
                    mounts
           Product: okular
           Version: 21.12.3
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: m.lincetto at gmail.com
  Target Milestone: ---

SUMMARY
When opening a small PDF file (less than 50 KB) on a remote filesystem mounted
through sshfs (fuse.sshfs), Okular takes almost 10 seconds to load. The
behaviour is the same regardless of the fact Okular is launched from Dolphin or
from the command line. Evince for comparison takes less than 2 seconds.

STEPS TO REPRODUCE
1. mount a remote filesystem using sshfs (from the shell)
2. open a PDF file with Okular

OBSERVED RESULT
Okular takes a long time to load (almost 10 seconds).

EXPECTED RESULT
Okular should take a time compatible with other PDF readers.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Ubuntu 22.04
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

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