Performance on a lower resolution than 1080?

Currently im using 2 TVs. 1 is a smart tv 3840x2160 resolution. Ive been gaming on this at 1440. My 2nd is 1368x760, ive been using it to have discord open and such. Obviously the TV is killing me frame wise, im aware. I was trying to find info on the 2nd resolution, and all i could find is its an older pc resolution. Will i have better performance using the 2nd?
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