Bug 457228 - Okular is very slow when loading files from sshfs mounts
Summary: Okular is very slow when loading files from sshfs mounts
Status: CONFIRMED
Alias: None
Product: okular
Classification: Applications
Component: general (show other bugs)
Version: 21.12.3
Platform: Ubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-07-28 08:17 UTC by Massimiliano L
Modified: 2023-11-09 03:41 UTC (History)
3 users (show)

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Description Massimiliano L 2022-07-28 08:17:32 UTC 
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
Comment 1 Jonathan E. Snow 2023-11-09 03:41:25 UTC 
Confirm, same is true over smb and nfs mounts if latency is >1ms. At 30ms the wait is ~30 seconds for a document to open.