Level 4
Maybe it depends on the system.For me, i am using Mcafee internet security ,before i used Avast and then KSCF and i can say the diferrence is huge on impact.Mcafee is much more lighter from both, not in numbers, but in reality,i mean apps,surfing etc.The most annoying is opening the GUI, take ages, but after installing 1903 this also got better.
Same for me, everything is blazing fast, and the numbers as per photo, are very low.