Are you saying you are sitting there watching the progress meter, waiting for it to finish up? You don't have to do that. If you just do something in Logic the analyzing will stop, to finish up later when you give Logic a couple of seconds off. The analyzing is for displaying the waveform graphically and you can set it to go really quickly or to do a slower but more detailed analyzes in order to display a more detailed graphical waveform on the screen.