[dolphin] [Bug 471018] New: Terrible browsing performance with mounted remote FS on links with high latency

[Andrey]

https://bugs.kde.org/show_bug.cgi?id=471018

            Bug ID: 471018
           Summary: Terrible browsing performance with mounted remote FS
                    on links with high latency
    Classification: Applications
           Product: dolphin
           Version: 22.12.3
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Keywords: usability
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: batonxleba at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
Performance with mounted remote FS like SSHFS or CIFS on links with 200+ ms
latency is terrible: whole window freezes for 5-15 sec on opening folder
(especially if there is a lot of sub-folders in there) and delays on any action
(even on mouse scrolling) still persists during a minute or two after folder's
file list was loaded. This also have an impact on desktop or trash bin
performance during that lag.

STEPS TO REPRODUCE
1. mount any cifs/sshfs with 200+ ms latency (mount foo at 192.168.0.1:/ /mnt/)
2. browse it in dolpin
3. "enjoy" with extremely high delays in file manager's work during content
load (up to 1-2 min total)

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.26.5
KDE Frameworks - Version 5.102.0
Qt - Version 5.15.8 (built against 5.15.8)

ADDITIONAL INFORMATION
I suppose that the main reason for this problem is that the Dolphin tries to
count directory size, so I propose you to consider to add an option which
disables this feature completely (globally or as a view for a certain folder).

Thanks.

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