For quite some time I've been having issue with krunner that it causes high ~95%) CPU load. I have indexing turned off as it also was an issue but that didn't help eventually.
KDE bug tracker: https://bugs.kde.org. Maybe
https://bugs.kde.org/show_bug.cgi?id=377715 and https://bugs.kde.org/show_bug.cgi?id=375500
– user26687Jan 12 '18 at 08:04
If you click on the icon to the left of the krunner text box, you could reduce the scope of what krunner does. See if that helps. For example, I have enabledCategories=Applications,Document,Folder,Image,Locations,Places,Plasma Desktop Shell,Recent Documents,System Settings,Terminate Applications and don't experience high CPU load because of krunner.
– DK BoseJan 12 '18 at 09:50
I have: command line, document, folder, kwin, locations, places, plasma desktop shell, power, recent documents, system settings, terminate applications unit converter, windows.
I'll check if reducing the plugins to the ones you have enabled helps. It isn't, however, solution to the problem :/
enabledCategories=Applications,Document,Folder,Image,Locations,Places,Plasma Desktop Shell,Recent Documents,System Settings,Terminate Applicationsand don't experience high CPU load because of krunner. – DK Bose Jan 12 '18 at 09:50I'll check if reducing the plugins to the ones you have enabled helps. It isn't, however, solution to the problem :/
– Artur Stępniak Jan 15 '18 at 09:34