https://bugs.kde.org/show_bug.cgi?id=524462
Bug ID: 524462
Summary: File information sha256 checksum almost unusably slow
on large files
Classification: Applications
Product: dolphin
Version First 26.04.3
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
DESCRIPTION
For a sizeable file, the file properties checksum tab's calculation of a sha256
checksum is so slow I wasn't sure if it had crashed behind the scenes. Using a
command line to perform the same action took a tiny fraction of the time,
furthermore the lack of any progress display makes the user question if it is
even working.
STEPS TO REPRODUCE
1. Obtain or create a large file 'test.iso' of around 30GiB.
2. Navigate to the file in Dolphin and right click, then select 'properties.'
3. Switch to the 'checksums' tab.
4. Click the 'calculate' button next to SHA256.
5. Time how long it takes until the checksum is displayed.
6. On the command line, enter the command: sha256sum ./test.iso
7. Time how long it takes until the checksum is displayed.
OBSERVED RESULT
1) CachyOS, 6c12t Ryzen 5 7500F, kernel 7.1.8-1, Plasma 6.7.4, Dolphin 26.04.3)
25GiB file took:
- Dolphin: ~90s
- sha256sum: 16 seconds.
2) aerynOs, AMD Ryzen 9 7950X, Kernel 7.1.8-50, Plasma 6.7.4, Dolphin 26.04.3
33.4GiB file took:
- Dolphin 237 seconds (ouch!)
- sha256sum: 16 seconds
EXPECTED RESULT
Dolphin performs the calculation quicker, or at very least gives the most basic
progress display if an operation will take over a minute.
SOFTWARE/OS VERSIONS
Operating System: AerynOS 2026.08
KDE Plasma Version: 6.7.4
KDE Frameworks Version: 6.29.0
Qt Version: 6.11.1
Kernel Version: 7.1.8-50.stable (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
Only tried the SHA256 calculation, may be an issue for the other checksums.
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