this post was submitted on 27 Oct 2023
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It must be very hard to exactly compare games between Windows and Linux because it's possible that emulation in Proton, WINE or the driver means some settings or extensions might not be enabled even if they appear to be. DirectX emulation is also bound to slow things down so a game probably has to be use OpenGL or Vulkan directly.
So while I can well believe that Linux can keep up and possibly exceed Windows, it needs a careful technical eye to ensure a true comparison is happening.
It's getting hard to do just between AMD and Nvidia on Windows.
I'm old enough to remember the days when reviewers showed macro shots of the wires in half life 2 to test AA between different cards.
Does anyone even test that enabling "Ultra" settings results in the same configuration across vendors/generations? I'm pretty sure LTT Labs found cases where it wasn't.
ltt labs, good one
To be fair if anyone is motivated to discover flaws in testing methodology and publicly disclose them right now it's Labs.