Best antivirus with low resource eating and high protection?

Hi,I would like to now what would be the best antivirus that doesn't take much computer resources and defends well against viruses.I don't care about price,so put free and high-costing antiviruses here.And don't recommend that AVG antivirus,cause it's a little sh*tty.So what would be THE best antivirus which doesn't slow down the computer?