Many thanks for looking at this thread.
I am using vino remote access server & xbmc on Ubuntu 12.04. Everything works nicely without any problems. Recently, I have looked at htop over the terminal, and I have discovered when I access the vino server the CPU usage shows around 20%, and when disconnect vnc access from the client software, the cpu shows around 90%. please find the screen shots below,
With accessing the vino:
Without accessing the vino:
Deeply appreciate and thanks in advance!