Update README.md

sequoiar · sequoiar · commit d14a14a6e76d · 2015-06-12T09:52:06.000+08:00
diff --git a/README.md b/README.md
@@ -4,6 +4,8 @@ TweetNacl in Java
 
 ### API/Usage
 
+### Suggest always use TweetNaclFast implementation
+
 #### Public key authenticated encryption
 
 * get key pair: Box.KeyPair kp = Box.keyPair(), kp = Box.keyPair_fromSecretKey(sk)
