The best way to test the performance of an antivirus is by initiating a FULL SYSTEM SCAM with all the advanced options activated. This is the first test to determine the scan speed and the way it detects possible infected applications.
Secondly, start the application without enabling gamer modes or something related, and start a resource demanding game. If there is a big impact on your game's performance, although you have a fast computer, then you can tell there is a problem with the antivirus and it needs replacing with another one.
After all these tests you can conclude which is the best for your computer.
