[Bug 34011] Path of Exile stutters constantly

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=34011

Zakk <zakk at rsdio.com> changed:

           What    |Removed                     |Added
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                 CC|                            |zakk at rsdio.com

--- Comment #32 from Zakk <zakk at rsdio.com> ---
Wine 2.9, MacOS: same freeze/stuttering issue. It is much much better on
Nvidia+GLSL disabled, but in that case some effects aren't rendered.

I put some crude timing/debugging into glsl_shader.c: I'm pretty sure this
issue is shader generation related.

One particular attack effect always stutters for me on first load; triggering
it causes  the generation of about 10-15 shaders, most of which take around 8ms
to load, with one or two taking around 12-15ms. I'm not sure if they're all
generated on a single frame, but it's probably enough to tank the frame rate no
matter what.

The game is frequently loading new shaders. You can mitigate it a bit by
forcing some preloading via the command line options, but it still doesn't
preload all monster shaders. Those seem to be deferred until they're actually
needed.

I suspect this is likely going to be an issue until either 1) the PoE devs
change how shaders are loaded in the game or 2) the wine generation of
hlsl->glsl gets significantly faster.

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