Index: org/apache/catalina/ant/AbstractCatalinaTask.java
===================================================================
--- org/apache/catalina/ant/AbstractCatalinaTask.java	(revision 831814)
+++ org/apache/catalina/ant/AbstractCatalinaTask.java	(working copy)
@@ -221,7 +221,7 @@
 
             // Process the response message
             reader = new InputStreamReader(hconn.getInputStream(), CHARSET);
-            StringBuffer buff = new StringBuffer();
+            StringBuilder buff = new StringBuilder();
             String error = null;
             int msgPriority = Project.MSG_INFO;
             boolean first = true;
Index: org/apache/catalina/ant/DeployTask.java
===================================================================
--- org/apache/catalina/ant/DeployTask.java	(revision 831814)
+++ org/apache/catalina/ant/DeployTask.java	(working copy)
@@ -176,7 +176,7 @@
         }
 
         // Building URL
-        StringBuffer sb = new StringBuffer("/deploy?path=");
+        StringBuilder sb = new StringBuilder("/deploy?path=");
         try {
             sb.append(URLEncoder.encode(this.path, getCharset()));
             if ((war == null) && (config != null)) {
Index: org/apache/catalina/ant/InstallTask.java
===================================================================
--- org/apache/catalina/ant/InstallTask.java	(revision 831814)
+++ org/apache/catalina/ant/InstallTask.java	(working copy)
@@ -101,7 +101,7 @@
             throw new BuildException
                 ("Must specify at least one of 'config' and 'war'");
         }
-        StringBuffer sb = new StringBuffer("/install?path=");
+        StringBuilder sb = new StringBuilder("/install?path=");
         sb.append(URLEncoder.encode(this.path));
         if (config != null) {
             sb.append("&config=");
Index: org/apache/catalina/ant/JKStatusUpdateTask.java
===================================================================
--- org/apache/catalina/ant/JKStatusUpdateTask.java	(revision 831814)
+++ org/apache/catalina/ant/JKStatusUpdateTask.java	(working copy)
@@ -272,7 +272,7 @@
 
         super.execute();
         checkParameter();
-        StringBuffer sb = createLink();
+        StringBuilder sb = createLink();
         execute(sb.toString(), null, null, -1);
 
     }
@@ -289,9 +289,9 @@
      * 
      * @return create jkstatus link
      */
-    private StringBuffer createLink() {
+    private StringBuilder createLink() {
         // Building URL
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         try {
             sb.append("?cmd=update&mime=txt");
             sb.append("&w=");