【转】string和stringBuilder性能比较

时间类：
using System;
using System.Diagnostics;
namespace DataStruct7
{
   publicclass Timing
    {
        TimeSpan duration;//时间差
public Timing()
        {
            duration =new TimeSpan(0);
        }
        //开始时间
publicvoid stopTime()
        {
            duration = Process.GetCurrentProcess().TotalProcessorTime;
        }
       //终止时间
        publicvoid startTime()
        {
            GC.Collect();
            GC.WaitForPendingFinalizers();
        }
       //返回结果
public TimeSpan Result()
        {
            return duration;
        }
    }
}


另一个类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DataStruct7
{
    class Program
    {
        staticvoid Main()
        {
            int size =100;
            Timing timeSB =new Timing();
            Timing timeST =new Timing();

            Console.WriteLine();
            for (int i =0; i <=3; i++)
            {
                timeSB.startTime();
                BuildSB(size);
                timeSB.stopTime();
                timeST.startTime();
                BuildString(size);
                timeST.stopTime();
                Console.WriteLine("时间（单位毫秒）创建 StringBuilder "+"对象有 "+
 size +" 字符需要的时间: "+ timeSB.Result().TotalMilliseconds);
                Console.WriteLine("时间（单位毫秒）创建 String  "+"对象有"+ 
size +" 字符需要的时间: "+ timeST.Result().TotalMilliseconds);
                Console.WriteLine();
                size *=10;
            }
        }
        //创建StringBuilder连接
staticvoid BuildSB(int size)
        {
            StringBuilder sbObject =new StringBuilder();
            for (int i =0; i <= size; i++)
                sbObject.Append("a");
        }
       //创建string连接
staticvoid BuildString(int size)
        {
            string stringObject ="";
            for (int i =0; i <= size; i++)
                stringObject +="a";
        }
    }
}

结果：