add benchmark test

src/test/java/com/alibaba/druid/benckmark/sql/MySqlPerfMain_visitor.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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.benckmark.sql;
+
+import java.lang.management.ManagementFactory;
+import java.util.List;
+
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitor;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+import com.alibaba.druid.sql.test.TestUtils;
+
+public class MySqlPerfMain_visitor {
+
+    public static void main(String[] args) throws Exception {
+        System.out.println(System.getProperty("java.vm.name") + " " + System.getProperty("java.runtime.version"));
+        List<String> arguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
+        System.out.println(arguments);
+
+        String sql = "SELECT ID, NAME, AGE FROM USER WHERE ID = ?";
+
+        for (int i = 0; i < 10; ++i) {
+            perfMySql(sql);
+        }
+    }
+
+    static long perfMySql(String sql) {
+        long startYGC = TestUtils.getYoungGC();
+        long startYGCTime = TestUtils.getYoungGCTime();
+        long startFGC = TestUtils.getFullGC();
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        
+        long startMillis = System.currentTimeMillis();
+        for (int i = 0; i < 1000 * 100 * 1; ++i) {
+            execMySql(statementList);
+        }
+        long millis = System.currentTimeMillis() - startMillis;
+
+        long ygc = TestUtils.getYoungGC() - startYGC;
+        long ygct = TestUtils.getYoungGCTime() - startYGCTime;
+        long fgc = TestUtils.getFullGC() - startFGC;
+
+        System.out.println("MySql\t" + millis + ", ygc " + ygc + ", ygct " + ygct + ", fgc " + fgc);
+        return millis;
+    }
+
+    static void execMySql(List<SQLStatement> statementList) {
+        MySqlASTVisitor visitor = new MySqlSchemaStatVisitor();
+
+        for (SQLStatement statement : statementList) {
+            statement.accept(visitor);
+        }
+    }
+}