https://bugs.winehq.org/show_bug.cgi?id=46148
--- Comment #4 from Kevin Grittner kgrittn@gmail.com --- (In reply to Zebediah Figura from comment #3)
Well, it'd be nice to know if this is a Staging bug or a regression in upstream Wine. As far as I am aware WoW needs several Staging patches to run, but if these are known then the most helpful thing to do would be to compile Staging with only those patches, and check if the regression is still present.
I'm not clear on whether you are requesting that I try this, or suggesting to the Wine developers. I've never built Wine from source, so it might take a bit to get set up for that.
Unless of course there is any intuition from the D3D developers as to what might have changed.
I was hoping that someone would have some idea what changes in this Wine Staging release might cause this.
I guess this should be filed as a separate bug, unless this seems likely to be related.
I would give odds that the performance hit is the result of the graphics bug; but I have no evidence other than the fact that they both appeared at the same time so I may be making the classic error of jumping from correlation to an assumption about causality without enough evidence.
Hopefully this staging release will be held back from GA until this is resolved.