[Bug 42592] The Witcher 3 has poor performance

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=42592

--- Comment #28 from Kai Krakow <kai at kaishome.de> ---
I applied the following staging patch:
https://dev.wine-staging.com/patches/204/
(shader parameter caching)

This only slightly improves FPS. But it still has a big impact on gameplay:

GPU usage now is 10-20% higher and CPU usage is around 10% lower. Especially
during rain, the game runs much better now. The biggest effect it has, tho, is
that input lag is reduced by a huge factor even in demanding areas like
Novigrad. But Novigrad still runs in slow-motion at times even while CPU usage
is lower and GPU usage is a little higher than before. Take note that
especially Novigrad doesn't gain that much GPU usage with this patch as I see
in other areas of the game.

It is still needed to limit the game to 30 FPS max as otherwise input lag comes
back again and the game feels like it's stuttering.

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