diff --git a/source/Ox/js/String.js b/source/Ox/js/String.js
index 8f28a701..176749f4 100644
--- a/source/Ox/js/String.js
+++ b/source/Ox/js/String.js
@@ -26,7 +26,8 @@ Ox.clean = function(string) {
 
 /*@
 Ox.endsWith <f> Tests if a string ends with a given substring
-    Equivalent to `new RegExp(Ox.escapeRegExp(substring) + '$').test(string)`.
+    Equivalent to (but faster than)
+    `new RegExp(Ox.escapeRegExp(substring) + '$').test(string)`.
     (string, substring) -> <b> True if string ends with substring
     > Ox.endsWith('foobar', 'bar')
     true
@@ -403,7 +404,8 @@ Ox.splice = function(string, index, remove) {
 
 /*@
 Ox.startsWith <f> Tests if a string ends with a given substring
-    Equivalent to `new RegExp('^' + Ox.escapeRegExp(substring)).test(string)`.
+    Equivalent to (but faster than)
+    `new RegExp('^' + Ox.escapeRegExp(substring)).test(string)`.
     (string, substring) -> <b> True if string starts with substring
     > Ox.startsWith('foobar', 'foo')
     true