[Bug 45209] Staging 3.8 crippling preformance degradation

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45209

--- Comment #7 from Józef Kucia <joseph.kucia at gmail.com> ---
 (In reply to Alistair Leslie-Hughes from comment #6)
> (In reply to Józef Kucia from comment #5)
> > (In reply to Alistair Leslie-Hughes from comment #4)
> > > The 32 bit version for works without fault with/out that patch.
> > 
> > Does the 32-bit version use d3d11?
> 
> No, it uses the dx9 interfaces.

Ok. So, the 0001-d3d11-D3D11_USAGE_DYNAMIC-needs-to-have-CPU-access patch
workarounds bug 45066 (which is likely Nvidia legacy driver bug), and it
severely degrades performance in d3d11 apps on all drivers. FWIW, I think that
buffer mapping optimizations for constant buffers might also "fix" bug 45066 in
the future. It might be also better to use nouveau instead of legacy Nvidia
drivers.

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