A game update can contain an updated graphics engine which behaves differently from the previous one. It can easily be that its new opengl renderer is less efficient which causes the slowdowns but it can also be in other parts of the Wow code.
A game update can contain an updated graphics engine which behaves differently from the previous one. It can easily be that its new opengl renderer is less efficient which causes the slowdowns but it can also be in other parts of the Wow code.