content: /*
   * Copyright 1999-2012 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.cobar;
  
  import java.nio.ByteBuffer;
  
  /**
   * @author xianmao.hexm 2011-5-9
   */
  public class BufferPerformanceMain {
  
      public void getAllocate() {
          ByteBuffer buffer = ByteBuffer.allocate(4096);
          byte[] b = new byte[1024];
  
          int count = 1000000;
          System.currentTimeMillis();
  
          long t1 = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              buffer.position(0);
              buffer.get(b);
          }
          long t2 = System.currentTimeMillis();
          System.out.println("take time:" + (t2 - t1) + " ms.(Get:allocate)");
      }
  
      public void getAllocateDirect() {
          ByteBuffer buffer = ByteBuffer.allocateDirect(4096);
          byte[] b = new byte[1024];
  
          int count = 1000000;
          System.currentTimeMillis();
  
          long t1 = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              buffer.position(0);
              buffer.get(b);
          }
          long t2 = System.currentTimeMillis();
          System.out.println("take time:" + (t2 - t1) + " ms.(Get:allocateDirect)");
      }
  
      public void putAllocate() {
          ByteBuffer buffer = ByteBuffer.allocate(4096);
          byte[] b = new byte[1024];
  
          int count = 1000000;
          System.currentTimeMillis();
  
          long t1 = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              buffer.position(0);
              buffer.put(b);
          }
          long t2 = System.currentTimeMillis();
          System.out.println("take time:" + (t2 - t1) + " ms.(Put:allocate)");
      }
  
      public void putAllocateDirect() {
          ByteBuffer buffer = ByteBuffer.allocateDirect(4096);
          byte[] b = new byte[1024];
  
          int count = 1000000;
          System.currentTimeMillis();
  
          long t1 = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              buffer.position(0);
              buffer.put(b);
          }
          long t2 = System.currentTimeMillis();
          System.out.println("take time:" + (t2 - t1) + " ms.(Put:allocateDirect)");
      }
  
      public void copyArrayDirect() {
          ByteBuffer buffer = ByteBuffer.allocateDirect(4096);
          while (buffer.hasRemaining()) {
              buffer.put((byte) 1);
          }
          byte[] b = new byte[1024];
          int count = 10000000;
          System.currentTimeMillis();
  
          long t1 = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              buffer.position(0);
              buffer.get(b, 0, b.length);
          }
          long t2 = System.currentTimeMillis();
          System.out.println("take time:" + (t2 - t1) + " ms.(testCopyArrayDirect)");
      }
  
      public void copyArray() {
          ByteBuffer buffer = ByteBuffer.allocate(4096);
          while (buffer.hasRemaining()) {
              buffer.put((byte) 1);
          }
          byte[] b = new byte[1024];
          int count = 10000000;
          System.currentTimeMillis();
  
          long t1 = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              buffer.position(0);
              buffer.get(b, 0, b.length);
          }
          long t2 = System.currentTimeMillis();
          System.out.println("take time:" + (t2 - t1) + " ms.(testCopyArray)");
      }
  
      public static void main(String[] args) {
  
      }
  
  }
  