It might degrade performance a little, but without something similar, I won't move from Nemo. In fact I might even rather use Windows.
This extension is a real performance-killer for Nemo. Please stay away. See http://forums.linuxmint.com/viewtopic.php?f=208&t=121789&start=20 for more information.
After installing, open terminal and type "killall nemo" and reopen Nemo to see changes
Much helpful when you listen to lot of music / watch lot of movies.