Minor performance improvements

Change-Id: I6552b7dc082b97c28bc889a378208d0588da755b
diff --git a/Changes b/Changes
index 245f122..dd48d28 100644
--- a/Changes
+++ b/Changes
@@ -1,7 +1,8 @@
-0.2.0 2023-09-05
+0.2.1 2023-09-05
     - Add english tokenizer.
     - Fix buffer bug.
     - Improve Readme.
+    - Minor performance improvements.
 
 0.1.7 2023-02-28
     - Add dependabot checks.