Allowed Configs

I'm trying to find out what configs are currently banable. I am just looking for a performance boost. I copied a youtubers settings - more than likely stupid - but as far as im aware it involves some improvements to visuals/visibility and performance. - The youtube video is 

https://youtu.be/2GtRq8k19sk?si=L8fURniEQQ_TLVP7 . And ive added the file for those very helpful people. Any help is greatly appreciated. Thank You.