Index: org/apache/juli/JdkLoggerFormatter.java
===================================================================
--- org/apache/juli/JdkLoggerFormatter.java	(revision 831814)
+++ org/apache/juli/JdkLoggerFormatter.java	(working copy)
@@ -61,7 +61,7 @@
             name = name.substring(name.lastIndexOf(".") + 1);
 
         // Use a string buffer for better performance
-        StringBuffer buf = new StringBuffer();
+        StringBuilder buf = new StringBuilder();
         
         buf.append(time);
         buf.append(" ");