diff --git a/core/src/main/java/com/taobao/arthas/core/command/klass100/SearchClassCommand.java b/core/src/main/java/com/taobao/arthas/core/command/klass100/SearchClassCommand.java
index c353ffddf..047027cc3 100644
--- a/core/src/main/java/com/taobao/arthas/core/command/klass100/SearchClassCommand.java
+++ b/core/src/main/java/com/taobao/arthas/core/command/klass100/SearchClassCommand.java
@@ -1,5 +1,15 @@
 package com.taobao.arthas.core.command.klass100;
 
+import static com.taobao.text.ui.Element.label;
+
+import java.lang.instrument.Instrumentation;
+import java.security.CodeSource;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Set;
+
 import com.taobao.arthas.core.command.Constants;
 import com.taobao.arthas.core.shell.command.AnnotatedCommand;
 import com.taobao.arthas.core.shell.command.CommandProcess;
@@ -17,12 +27,6 @@ import com.taobao.text.ui.Element;
 import com.taobao.text.ui.TableElement;
 import com.taobao.text.util.RenderUtil;
 
-import java.lang.instrument.Instrumentation;
-import java.security.CodeSource;
-import java.util.Set;
-
-import static com.taobao.text.ui.Element.label;
-
 /**
  * 展示类信息
  *
@@ -43,6 +47,14 @@ public class SearchClassCommand extends AnnotatedCommand {
     private boolean isRegEx = false;
     private Integer expand;
 
+    public static String getCodeSource(final CodeSource cs) {
+        if (null == cs || null == cs.getLocation() || null == cs.getLocation().getFile()) {
+            return com.taobao.arthas.core.util.Constants.EMPTY_STRING;
+        }
+
+        return cs.getLocation().getFile();
+    }
+
     @Argument(argName = "class-pattern", index = 0)
     @Description("Class name pattern, use either '.' or '/' as separator")
     public void setClassPattern(String classPattern) {
@@ -78,7 +90,13 @@ public class SearchClassCommand extends AnnotatedCommand {
         // TODO: null check
         RowAffect affect = new RowAffect();
         Instrumentation inst = process.session().getInstrumentation();
-        Set<Class<?>> matchedClasses = SearchUtils.searchClass(inst, classPattern, isRegEx);
+        List<Class<?>> matchedClasses = new ArrayList(SearchUtils.searchClass(inst, classPattern, isRegEx));
+        Collections.sort(matchedClasses, new Comparator() {
+            @Override
+            public int compare(Object o1, Object o2) {
+                return StringUtils.classname((Class) o1).compareTo(StringUtils.classname((Class) o2));
+            }
+        });
 
         for (Class<?> clazz : matchedClasses) {
             processClass(process, clazz);
@@ -127,12 +145,4 @@ public class SearchClassCommand extends AnnotatedCommand {
         return table;
     }
 
-    public static String getCodeSource(final CodeSource cs) {
-        if (null == cs || null == cs.getLocation() || null == cs.getLocation().getFile()) {
-            return com.taobao.arthas.core.util.Constants.EMPTY_STRING;
-        }
-
-        return cs.getLocation().getFile();
-    }
-
 }
diff --git a/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchAdviceListener.java b/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchAdviceListener.java
index dcd655a02..7bda4dcce 100644
--- a/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchAdviceListener.java
+++ b/core/src/main/java/com/taobao/arthas/core/command/monitor200/WatchAdviceListener.java
@@ -1,9 +1,9 @@
 package com.taobao.arthas.core.command.monitor200;
 
-import com.taobao.arthas.core.advisor.ReflectAdviceListenerAdapter;
-import com.taobao.arthas.core.shell.command.CommandProcess;
 import com.taobao.arthas.core.advisor.Advice;
 import com.taobao.arthas.core.advisor.ArthasMethod;
+import com.taobao.arthas.core.advisor.ReflectAdviceListenerAdapter;
+import com.taobao.arthas.core.shell.command.CommandProcess;
 import com.taobao.arthas.core.util.DateUtils;
 import com.taobao.arthas.core.util.LogUtil;
 import com.taobao.arthas.core.util.StringUtils;
@@ -11,9 +11,6 @@ import com.taobao.arthas.core.util.ThreadLocalWatch;
 import com.taobao.arthas.core.view.ObjectView;
 import com.taobao.middleware.logger.Logger;
 
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
 /**
  * @author beiwei30 on 29/11/2016.
  */
@@ -85,7 +82,7 @@ class WatchAdviceListener extends ReflectAdviceListenerAdapter {
                 Object value = getExpressionResult(command.getExpress(), advice, cost);
                 String result = StringUtils.objectToString(
                         isNeedExpand() ? new ObjectView(value, command.getExpand(), command.getSizeLimit()).draw() : value);
-                process.write("ts=" + DateUtils.getCurrentDate() + ";result=" + result + "\n");
+                process.write("ts=" + DateUtils.getCurrentDate() + "; [cost=" + cost + "ms] result=" + result + "\n");
                 process.times().incrementAndGet();
                 if (isLimitExceeded(command.getNumberOfLimit(), process.times().get())) {
                     abortProcess(process, command.getNumberOfLimit());
diff --git a/site/src/site/sphinx/en/thread.md b/site/src/site/sphinx/en/thread.md
index 21e00d33f..51aff9563 100644
--- a/site/src/site/sphinx/en/thread.md
+++ b/site/src/site/sphinx/en/thread.md
@@ -139,7 +139,7 @@ $ thread -b
     - java.util.concurrent.ThreadPoolExecutor$Worker@31a6493e
 ```
 
-> Attention: only `synchronized` blocked threads can be located for now, `JUL` not supported yet.
+Attention: only `synchronized` blocked threads can be located for now, while `java.util.concurrent.Lock` not supported yet.
 
 
 #### thread -i specify the collecting interval
diff --git a/site/src/site/sphinx/thread.md b/site/src/site/sphinx/thread.md
index bf2d8411b..2430180fc 100644
--- a/site/src/site/sphinx/thread.md
+++ b/site/src/site/sphinx/thread.md
@@ -138,7 +138,7 @@ $ thread -b
     - java.util.concurrent.ThreadPoolExecutor$Worker@31a6493e
 ```
 
-> 注意， 目前只支持找出synchronized关键字阻塞住的线程， 如果是JUL的锁， 目前还不支持。
+> 注意， 目前只支持找出synchronized关键字阻塞住的线程， 如果是`java.util.concurrent.Lock`， 目前还不支持。
 
 
 #### thread -i, 指定采样时间间隔
@@ -162,4 +162,4 @@ $ thread -n 3 -i 1000
     Number of locked synchronizers = 1
     - java.util.concurrent.ThreadPoolExecutor$Worker@546aeec1
 ...
-```
\ No newline at end of file
+```