[Bug 44315] Buffer maps cause CPU-GPU synchronization (Guild Wars 2)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=44315

--- Comment #7 from Ganni87 <jonfarr87 at gmail.com> ---
(In reply to Henri Verbeet from comment #5)
> (In reply to Matteo Bruni from comment #4)
> > I think you're spot on. It looks like wine-staging 2.0 was the last version
> > with the CSMT buffer map optimization hacks which, in some cases, could
> > reduce CPU-GPU synchronization significantly and thus improve game
> > performance.
> > 
> > We'll probably introduce something non-hacky to the same effect in wined3d
> > at some point in the future.
> 
> It's a bit awkward to have this as a bug against the Wine product though,
> since it basically amounts to "D3D performance could be better". Wine never
> had those hacks—and for good reason—so GW2 performance in Wine shouldn't be
> any worse than it ever was. (If it is, please do a regression test.) At the
> same time, it doesn't seem al that likely that Staging would be willing to
> take this as their bug and work on bringing those hacks back in an
> acceptable form.

Unfortunately the performance loss is very much noticeable especially when you
play the same game regularly for over 5 years.

As I've mentioned in my report, the rest of the games I play weren't affected.
If there's a way to apply this hack manually to modern Wine versions I wouldn't
mind building the binaries myself.

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