Just because I saw this I didn't understand 
sorry I am newbie with openwrt
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I'm not a gamer. I don't use my Internet to play, but I was curious to know what this configuration could add to my local network. Initially, my butterfload grade was F. Without having anything installed. I made the adjustments that were mentioned based on the explanations, until I reached A. The improvement is really noticeable. Thanks for the tips, you made me reach a new level of connection that I hadn't experienced before.