ksgrd_network_helper may occasionally cause high cpu usage or at least take some cpu time, most likely caused by qbittorrent and the like (it only appears to really use cpu when such applications are running), so this may be a performance issue with ksgrd_network_helper.
Either way, i would like to disable this process because even if i suspend it, it keeps coming back. some suggested that it was used by the “download” and “upload” columns on ksysguard, and hiding them would solve this but it didn’t for me.
i know that the system monitor app is going to replace ksysguard as the default kde process monitor eventually (and by the looks of it i rather keep using ksysguard personally).
It’ll only do that when you’re actively looking at it, because then it needs to update both the screen and the process list all the time as well. If you have it running in the background but you’re working at ─ for instance ─ a different virtual desktop, then the load caused by the applet itself will be far less.