Performance art

I think performance art 

To entertain your self.To perform what you want to show are perform to other,

The art important to me is can make we feel relax and feel comtiple 

History change is the long time ago the music it really slow and word but now the music fast and loud like rock and the classic music is sort but fast 

I can change the performace by showing the performance 

The question that I have is why the music now not good that old so g and music?