From the comments the big gains are from using wineserver in userland but valve/steam/deck/proton uses fsync which is already a kernel api, so there then won't

From the comments the big gains are from using wineserver in userland but valve/steam/deck/proton uses fsync which is already a kernel api, so there then won't be these big gains. I'm very suspicious vale/proton/wine slept on 2-3x performance boosts. It sounds like this problem is already solved, but this implementation might be more elegant, but its the same performance out of edge cases.