peformance issues while texture Painting (in my case a FIX)

hi everyone,
I had this performance issue, while texturepainting on my Windows-system with 560ti.

In the Bugtrackter Brecht mentioned, that change in the Render>Performance panel the threads to Fixed and 1 Thread could solve this.

In my case this worked out awsome well.

So, previous Posts where colsed withous solution, so i just want to share my results. hope this could help anyone,why had the same issue.