Update README.md with performance information

Title's self explanatory. I timed paleofetch and neofetch, and though it is a good idea to put that in the readme.

README.md

@@ -4,6 +4,14 @@ paleofetch
 A rewrite of [neofetch](https://github.com/dylanaraps/neofetch) in C.
 Currently only supports Linux and Xorg.
 
+
+Why use paleofetch over neofetch?
+-----------------------------------------
+One major reason is the performance improvement. For example: neofetch finishes running after about 222 milliseconds where as paleofetch can finish running in a blazing fast 3 milliseconds.
+
+Note: this testing occured on only 1 computer, it's not a good representation on the performance benefit you may gain.
+
+
 Example output:
 
 ![example output](example.png)