Bug 513655

SUMMARY
A 2.2 GiB kioworker process is spawned when a folder viewed in Dolphin includes a kdenlive project file.
As soon as I remove the kdenlive project, only a 38.9 MiB kioworker spawns. The folder still includes a few small JPGs/PNGs.
From the original directory that triggered me troubleshooting this, 2 out of 14 folders had kdenlive projects in them, totaling up to 3 kdenlive project files.
Viewing this folder causes 5x 2.2 GiB kioworker processes to spawn, making it impossible to do anything RAM intensive on my system.

STEPS TO REPRODUCE
1. Open kdenlive
2. Create new project (1440p 60fps in this case), drag random image into timeline, save project, close.
3. Open dolphin
4. Navigate to folder including the kdenlive project
5. Search for kioworker in KDE System Monitor processes panel, observe amount & RAM usage

OBSERVED RESULT
5 kioworker processes with 2.2-2.8 GiB of memory usage are spawned.

EXPECTED RESULT
I-don't-know-how-many-but-perhaps-less kioworker processes with ~30 MiB (?) are spawned.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: EndeavourOS 6.18.2-arch2-1 (64-bit) with KDE Wayland
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 25.12.0-1
Qt Version: 6.10.1

ADDITIONAL INFORMATION
What I find interesting is that the "pest" spreads over to the other processes.
No kdenlive projects: 5 kioworker processes with ~70 MiB
With kdenlive projects: 5 kioworker processes with ~2.8 GiB

Closing dolphin immediately stops the kioworker processes.

I tried replicating the issue on my laptop (same folder, same distro, same packages, same versions, same dolphinrc(!!)) but it refuses to display thumbnails for kdenlive files and folders in general.

Originally posted on Reddit: https://www.reddit.com/r/kde/comments/1prq81b/dolphin_creates_a_bunch_of_22_gib_kioworkers_for/
I hope this bug report is okay, please let me know if I missed something/mislabeled it, it's my first time using Bugzilla.