Update README.md

NullVoxPopuli · web-flow · commit b957f9c933ef · 2016-09-24T07:49:25.000-04:00
diff --git a/README.md b/README.md
@@ -18,6 +18,8 @@ or
 ```bash
 gem install case_transform
 ```
+
+And for faster performance, checkout [Case Transform with Native Extensions](https://github.com/NullVoxPopuli/case_transform-rust-extensions)
 ## Usage
 
 ```ruby
