[Bug 44315] Guild Wars 2 - Slow Performance since Wine 2.1

[wine-bugs at winehq.org]

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

Matteo Bruni <matteo.mystral at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
          Component|-unknown                    |directx-d3d
             Status|UNCONFIRMED                 |NEW

--- Comment #4 from Matteo Bruni <matteo.mystral at gmail.com> ---
(In reply to Ganni87 from comment #0)
> Wine 2.0 (with Staging patches) was the last version to run this game at a
> good performance, From 2.1 up to 3.0rc5 it results in a major framerate loss
> in every aspect of the game. The staging versions (up to 2.21) perform the
> same as "non staging" Wine.
> 
> While no other of my tested games were affected, it looks as if something in
> CSMT was changed and affected this particular title. I've tested this across
> multiple system configurations and the results are always the same.

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.

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