Hi, I met a bug.
I installed plasma-workspace-5.9.3-2.fc25.x86_64 from the copr, and in Xorg.
But I found in sometime, cpu load will be 100%, I often found one cpu is 100%.
PS: just before, I found wireshark is not-responding and one cpu is 100%, so I kill wireshark, All cpu is immediately 100%.