I'm so ready for the upcoming benchmarks. Proton was using FSYNC (as I understand this is a workaround until NTSYNC was implemented) already, which means that NTSYNC will not make a huge difference here with most games. To be honest, I don't have deep understanding of this, that's why the benchmarks are important for me to get a "feeling" how the improvements will affect.

[–] Feyd@programming.dev 10 points 2 weeks ago* (last edited 2 weeks ago)

The expectation is the ntsync is more correct than and thus will work for more programs than esync/fsync. I'd expect for games that already work well in proton there will be no noticeable change for the end user