This has been an issue with Dolphin for the last hundred revisions or so, enabling Vsync and/or Anti-Aliasing causes extreme lag in some games, stuttering and skipping in other games.
It is recommended not to use these options until developers can at least sort out this problems, I was hoping this problem would of been fixed by now since Nolan said he was going to work on it when he returned on July 9th.
Besides this problem, the frame rate counter whether you are using the built in FPS counter in the OpenGL plugin or something like Fraps, has been highly inaccurate for several revisions now.
It is recommended not to use these options until developers can at least sort out this problems, I was hoping this problem would of been fixed by now since Nolan said he was going to work on it when he returned on July 9th.
Besides this problem, the frame rate counter whether you are using the built in FPS counter in the OpenGL plugin or something like Fraps, has been highly inaccurate for several revisions now.