[dolphin] [Bug 460126] New: Previews are not cached (remote fs)

[bankman22]

https://bugs.kde.org/show_bug.cgi?id=460126

            Bug ID: 460126
           Summary: Previews are not cached (remote fs)
    Classification: Applications
           Product: dolphin
           Version: 22.08.1
          Platform: Archlinux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: bankman22 at protonmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
When browsing a remote fs, Dolphin is extremely wasteful about thumbnail
generation.
Dolphin does not seem to cache any previews and re-generates previews for a
file on every encounter. This is bad for the following reasons:
- wear and tear on hard disks
- network usage
- slows down browsing, even a moderate amount of files, nothing out of the
ordinary, can grind Dolphin to halt; one has to wait seconds on every
navigation before being able to perform the next navigation

STEPS TO REPRODUCE
1. Ensure you have a remote fs
2. Open iftop
3. Open Dolphin
4. Ensure Dolphin detects your fs as a remote fs (check whether it's listed
under "Remote" in the sidebar)
5. Navigate to any directory that contains files which Dolphin generates
previews for, observe traffic spike in iftop session, observe thumbnail
generation
6. Navigate to a different directory
7. Navigate to the initial directory and observe traffic spike in iftop
session, observe thumbnail regeneration

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux (x86_64)/5.25.5
KDE Plasma Version: 5.25.5-1
KDE Frameworks Version: 5.98.0-1
Qt Version: 5.15.6+kde+r177-1

ADDITIONAL INFORMATION
The remote fs that I used for testing is a SMB share mounted via CIFS. Dolphin
correctly detects it as a remote fs, it is listed under "Remote".

-- 
You are receiving this mail because:
You are on the CC list for the bug.