Index: org/apache/tomcat/util/http/mapper/Mapper.java
===================================================================
--- org/apache/tomcat/util/http/mapper/Mapper.java	(revision 831814)
+++ org/apache/tomcat/util/http/mapper/Mapper.java	(working copy)
@@ -500,7 +500,7 @@
 
     public String getWrappersString( String host, String context ) {
         String names[]=getWrapperNames(host, context);
-        StringBuffer sb=new StringBuffer();
+        StringBuilder sb=new StringBuilder();
         for( int i=0; i<names.length; i++ ) {
             sb.append(names[i]).append(":");
         }