diff --git a/README.md b/README.md
index fa95a8a..b15a618 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ $ make && sudo make install
 
 ## Why?
 
-This `lolcat` clone is an attempt to reduce the world's carbon dioxide emissions by optimizing inefficient code.
+This `lolcat` clone is an attempt to reduce the world's carbon dioxide emissions by optimizing inefficient code. It's >10x as fast and <0.1% as large as the original one.
 
 ```bash
 newton~/d/lolcat <3 dmesg>foo