Bluetooth Magic Mouse lag / stutter .. , Apple Keyboard lag / stutter

Hello,

I recently installed fresh Yosemite OS X on my MacBook Pro, and I'm noticing a lag when I move the Magic Mouse or when I scroll up or down. With the Keyboard, sometimes I have to wait for half or a 1 second so the letters to be printed on the screen.

Did anyone faced the same issue ? I googled many forums and many people are facing the same issue even with upgrade from Mavericks to Yosemite.

Appreciate your help!

Thanks,

Joe