Bug 487011

Summary:	Systemmonitor has much longer loading times wrt ksysguard
Product:	[Applications] plasma-systemmonitor	Reporter:	SolidTemperature0 <i6icgp6>
Component:	general	Assignee:	KSysGuard Developers <ksysguard-bugs>
Status:	CONFIRMED ---
Severity:	normal	CC:	ahiemstra, albandil, aspotashev, daf.public, f.alexander.wilms, plasma-bugs-null, postix, waqar.17a
Priority:	NOR
Version First Reported In:	6.0.4
Target Milestone:	---
Platform:	Manjaro
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=479321
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description SolidTemperature0 2024-05-14 11:03:22 UTC

SUMMARY
Systemmonitor is slow at loading, whenever is opening the application or load an unloaded tab.
I cannot give you some exact numbers, also because ksysguard is not available anymore in kde 6, but opening ksysguard was immediate from when i clicked on its icon to when its window happeared, systemmonitor instead takes from half to a whole second to open and loading its tabs (the process table seems to be the slowest to load).
Note that I'm only preloading only the same pages that I had on ksysguard (with the equivalent sensors and graph), so the performances should be quite similar. In particular I'm using the process table, the history tab and a custom tab with a graph for each cpu core that shows its usage (as I said, I had the same tab also on ksysguard).


SOFTWARE/OS VERSIONS 
Linux: 6.9.0
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0

Comment 1 postix 2024-10-17 13:34:49 UTC

*** Bug 487223 has been marked as a duplicate of this bug. ***

Comment 2 Alexander Potashev 2025-01-03 20:47:01 UTC

Comparing KSM to KSG here, KSM takes ~4 seconds to get to the process list (excluding human reaction time to switch to the Processes tab). IIRC, KSG on Plasma 5 used to load within <0.5 seconds (much faster).

The difference not only wastes users' time, but also
 1. has effect on users' opinions (for example: I feel annoyed and helpless when I want to check process list and it takes too long to load)
 2. bad press (https://discuss.kde.org/t/bring-ksysguard-back-as-neither-plasma-systemmonitor-ksystemstats-are-any-good/8469)
 3. changes how a user works (e.g. switching to command line tools; checking the process list less frequently only when absolutely necessary).

===

Operating System: Fedora Linux 41
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.12.6-200.fc41.x86_64 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.4 ГиБ of RAM
Graphics Processor: Mesa Intel® HD Graphics 530

Comment 3 daf 2025-05-09 23:53:38 UTC

This seems to have gotten noticeably worse.

If setting the sidebar to collapse the animation will play as if it was rendering in single digit fps. Then opening a tab like processes or applications takes 2s to show anything the first time you click it.

Ksysguard still loads instant so there's no reason why it's replacement takes 2 seconds to load each tab.