hibernate和jdbc加载对象性能

core2 P8400, 4G mem

我的测试100W记录,mysql使用缺省安装，java -server -Xms2048M -Xmx2048M

hibernate

insert 1000000 count, consume 521.133 seconds

jdbc

insert 1000000 count, consume 508.46 seconds

select count(*) from APP_USER; 1000000 rows, 0.31 seconds;

结构APP_USER(ID, NAME, PASSWORD)

写入数据i: insert into APP_USER(NAME, PASSWORD) values(String.valueOf(i), String.valueOf(i));

可见Hibernate性能并不太慢。大约损失性能2.75%还是可以接受，如果对性能苛刻的要求建议还是直接jdbc吧。

• hibernate：

  @Test
  	@Transactional(propagation = Propagation.REQUIRES_NEW)
  	public void testHibernate() {
  		logger.info("start test Hibernate...");  
          long begin = System.currentTimeMillis();
          baseDao.saveOrUpdateAll(users);
          long end = System.currentTimeMillis();  
          logger.info("insert " + num + " count, consume " + (end - begin) / 1000f + " seconds");  
  	}

   
• jdbc

  @Test
  	@Transactional(propagation = Propagation.REQUIRES_NEW)
  	public void testJdbc() {
  		logger.info("start test jdbc...");  
          long begin = System.currentTimeMillis();
          jdbcTemplate.batchUpdate("insert into APP_USER(NAME, PASSWORD) values (?, ?)", new BatchPreparedStatementSetter() {
  			@Override
  			public void setValues(PreparedStatement ps, int row) throws SQLException {
  				User user = users.get(row);
  				ps.setString(1, user.getName());
  				ps.setString(2, user.getPassword());
  			}
  			@Override
  			public int getBatchSize() {
  				return users.size();
  			}
  		});
          long end = System.currentTimeMillis();  
          logger.info("insert " + num + " count, consume " + (end - begin) / 1000f + " seconds");  
  	}