Bug 467774

Summary:	High CPU usage when a video content is changing (like in downloads/renders)
Product:	[Frameworks and Libraries] kio-extras	Reporter:	Mohammad K. <mokazemi>
Component:	Thumbnails and previews	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	CONFIRMED ---
Severity:	normal	CC:	jessica, miranda
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Mohammad K. 2023-03-25 12:29:00 UTC

SUMMARY
***
When a file content is changing (like dwnloading a video or rendering), if the file directory is open in Dolphin, it tries to generate a thumbnail every moment, which causes a high cpu usage.
***


STEPS TO REPRODUCE
1. Enable file thumbnails in Dophin
2. Open a directory 
3. Start downloading a video in that directory
4. See the high CPU usage of thumbnail generator

SOFTWARE/OS VERSIONS

KDE Plasma Version: 5.27.3
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
Kernel Version: 6.2.8-arch1-1 (64-bit)
Graphics Platform: Wayland

Comment 1 Jessica M 2023-12-20 22:33:28 UTC

I can confirm that this also happens to me. When copying a movie from a network drive for example, my CPU usage skyrockets because a ton of kioworkers start generating a new thumbnail every time the file is modified, which is constantly. If I disable thumbnails for videos it doesn't happen.