okay so what alternative do you suggest which could be better used in exe formats I feel that unzipping from exe isn't the best solution to this problem

(like some exe contain some zip file inside them and extract them)

yes I think it does indeed have better ratio than 7z with better speed , I think without the need of extraction.

Traditional file compression doesn't work that well as compared to upx. Upx supports as much as 500 mb/s on any reasonable device (this is very comparable to https://github.com/mhx/dwarfs) , which is honestly insane.

Okay agreed.