I’m not sure it’s a Wine/Proton thing, it’s quite likely to be suboptimal at some things because it’s reverse engineered (not to diminish technical marvel that it is and decades of effort). Regular desktop Windows has just way too much overhead coming from everywhere.
As a side note, back in the day when Nvidia released drivers for FreeBSD using Linux binary compatibility layer was even faster than Linux for gaming.
I’m not sure it’s a Wine/Proton thing, it’s quite likely to be suboptimal at some things because it’s reverse engineered (not to diminish technical marvel that it is and decades of effort). Regular desktop Windows has just way too much overhead coming from everywhere.
As a side note, back in the day when Nvidia released drivers for FreeBSD using Linux binary compatibility layer was even faster than Linux for gaming.