请教如何计算某段算法耗时多少毫秒?
											如题										
					
	
	    2008-06-06 13:34
  
	    2008-06-06 13:39
  
	    2008-06-06 13:44
  
	    2008-06-06 17:59
  
	    2008-06-06 18:36
  
	    2008-06-06 21:47
  
	    2008-06-06 22:00
  
	    2008-06-07 09:49
  
	    2008-06-07 11:16
  
	    2008-06-07 11:55