diff --git a/src/test/java/com/alibaba/druid/pool/benckmark/Case0.java b/src/test/java/com/alibaba/druid/pool/benckmark/Case0.java
index 37e778cc04..977dd7694a 100644
--- a/src/test/java/com/alibaba/druid/pool/benckmark/Case0.java
+++ b/src/test/java/com/alibaba/druid/pool/benckmark/Case0.java
@@ -27,10 +27,11 @@ public class Case0 extends TestCase {
     private String user;
     private String password;
     private String driverClass;
-    private int    initialSize = 10;
-    private int    minPoolSize = 1;
-    private int    maxPoolSize = 2;
-    private int    maxActive   = 2;
+    private int    initialSize     = 10;
+    private int    minPoolSize     = 1;
+    private int    maxPoolSize     = 2;
+    private int    maxActive       = 2;
+    private String validationQuery = null;
 
     protected void setUp() throws Exception {
         jdbcUrl = "jdbc:fake:dragoon_v25masterdb";
@@ -52,7 +53,7 @@ public class Case0 extends TestCase {
         dataSource.setPoolPreparedStatements(true);
         dataSource.setUsername(user);
         dataSource.setPassword(password);
-        dataSource.setValidationQuery("SELECT 1");
+        dataSource.setValidationQuery(validationQuery);
         dataSource.setTestOnBorrow(true);
 
         for (int i = 0; i < 10; ++i) {
diff --git a/src/test/java/com/alibaba/druid/pool/benckmark/Case1.java b/src/test/java/com/alibaba/druid/pool/benckmark/Case1.java
new file mode 100644
index 0000000000..3b00d606d8
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/pool/benckmark/Case1.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2011 Alibaba Group. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions and limitations under the
+ * License.
+ */
+package com.alibaba.druid.pool.benckmark;
+
+import java.sql.Connection;
+import java.text.NumberFormat;
+import java.util.concurrent.CountDownLatch;
+
+import javax.sql.DataSource;
+
+import junit.framework.TestCase;
+
+import org.apache.commons.dbcp.BasicDataSource;
+
+import com.alibaba.druid.TestUtil;
+import com.alibaba.druid.pool.DruidDataSource;
+
+public class Case1 extends TestCase {
+
+    private String jdbcUrl;
+    private String user;
+    private String password;
+    private String driverClass;
+    private int    initialSize     = 10;
+    private int    minPoolSize     = 1;
+    private int    maxPoolSize     = 2;
+    private int    maxActive       = 2;
+    private String validationQuery = "SELECT 1";
+
+    protected void setUp() throws Exception {
+        jdbcUrl = "jdbc:fake:dragoon_v25masterdb";
+        user = "dragoon25";
+        password = "dragoon25";
+        driverClass = "com.alibaba.druid.mock.MockDriver";
+    }
+
+    public void test_0() throws Exception {
+        DruidDataSource dataSource = new DruidDataSource();
+
+        dataSource.setInitialSize(initialSize);
+        dataSource.setMaxActive(maxActive);
+        dataSource.setMinIdle(minPoolSize);
+        dataSource.setMaxIdle(maxPoolSize);
+        dataSource.setPoolPreparedStatements(true);
+        dataSource.setDriverClassName(driverClass);
+        dataSource.setUrl(jdbcUrl);
+        dataSource.setPoolPreparedStatements(true);
+        dataSource.setUsername(user);
+        dataSource.setPassword(password);
+        dataSource.setValidationQuery(validationQuery);
+        dataSource.setTestOnBorrow(true);
+
+        for (int i = 0; i < 10; ++i) {
+            p0(dataSource, "druid", 2);
+        }
+        System.out.println();
+    }
+
+    public void test_1() throws Exception {
+        final BasicDataSource dataSource = new BasicDataSource();
+
+        dataSource.setInitialSize(initialSize);
+        dataSource.setMaxActive(maxActive);
+        dataSource.setMinIdle(minPoolSize);
+        dataSource.setMaxIdle(maxPoolSize);
+        dataSource.setPoolPreparedStatements(true);
+        dataSource.setDriverClassName(driverClass);
+        dataSource.setUrl(jdbcUrl);
+        dataSource.setPoolPreparedStatements(true);
+        dataSource.setUsername(user);
+        dataSource.setPassword(password);
+        dataSource.setValidationQuery("SELECT 1");
+        dataSource.setTestOnBorrow(true);
+
+        for (int i = 0; i < 10; ++i) {
+            p0(dataSource, "dbcp", 2);
+        }
+        System.out.println();
+    }
+
+    private void p0(final DataSource dataSource, String name, int threadCount) throws Exception {
+
+        final CountDownLatch startLatch = new CountDownLatch(1);
+        final CountDownLatch endLatch = new CountDownLatch(1);
+        for (int i = 0; i < threadCount; ++i) {
+            Thread thread = new Thread() {
+
+                public void run() {
+                    try {
+                        startLatch.await();
+                        final int COUNT = 1000 * 1000;
+                        for (int i = 0; i < COUNT; ++i) {
+                            Connection conn = dataSource.getConnection();
+                            conn.close();
+                        }
+                    } catch (Exception ex) {
+                        ex.printStackTrace();
+                    }
+                    endLatch.countDown();
+                }
+            };
+            thread.start();
+        }
+        long startMillis = System.currentTimeMillis();
+        long startYGC = TestUtil.getYoungGC();
+        long startFullGC = TestUtil.getFullGC();
+        startLatch.countDown();
+        endLatch.await();
+
+        long millis = System.currentTimeMillis() - startMillis;
+        long ygc = TestUtil.getYoungGC() - startYGC;
+        long fullGC = TestUtil.getFullGC() - startFullGC;
+
+        System.out.println("thread " + threadCount + " " + name + " millis : "
+                           + NumberFormat.getInstance().format(millis) + ", YGC " + ygc + " FGC " + fullGC);
+    }
+}