docs: update readme (intro) [skip ci]

adhocore · web-flow · commit a039dfde1ca8 · 2018-06-30T15:21:42.000+07:00
diff --git a/readme.md b/readme.md
@@ -9,6 +9,7 @@
 
 
 - Lightweight Cron expression parser library for PHP.
+- Very fast because it bails early in case a segment doesnt match.
 
 ## Installation
 ```bash
