Now, many of us run on different processors so this "mitigation" will work WONDERS for some, and other others offer little improvement. For myself, on both my PC's Intel Core 2 Duo 3.0Ghz and iMac's Intel Core 2 Duo 3.06Ghz this works wonders, but like I said, for others maybe not so much.
In the past I've told people every time they run the game to open Task Manager and "Set Affinity" on WoW.exe to 1 CPU. This is an annoyance as you have to run it EVERYTIME YOU RUN THE GAME. Well I discovered there was a WoW setting for this that can be stored in the game files so you no longer have to do that. This also is a viable fix for Mac OS X since you cannot set affinity on Mac binaries.
1. Make sure WoW is completely closed
2. Go to your WoW installation folder
3. Go into /WTF/ and open Config.wtf in Notepad or some text editor program
4. Add the following line:
NOTE: If you already have a "processAffinityMask" in there, MAKE SURE IT'S SET TO "1"!SET processAffinityMask "1"