string类与StringBuilder类性能比较
我们都知道StringBuilder的性能要比string类，是否具体测试过呢，我这里就给出这个程序供测试，一个是Timing类，用来计算时间的。另外一个类就是分别建立string,和stringbuider 类建立100，1000，10000，100000字符连接进行比较。
using System;
using System.Diagnostics;
namespace DataStruct7
{
public class Timing
{
TimeSpan duration;//时间差
public Timing()
{
duration = new TimeSpan(0);
}
//开始时间
public void stopTime()
{
duration = Process.GetCurrentProcess().TotalProcessorTime;
}
//终止时间
public void startTime()
{
GC.Collect();
GC.WaitForPendingFinalizers();
}
//返回结果
public TimeSpan Result()
{
return duration;
}
}
}
另外个类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace DataStruct7
{
class Program
{
static void 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
static void BuildSB(int size)
{
StringBuilder sbObject = new StringBuilder();
for (int i = 0; i <= size; i++)
sbObject.Append("a");
}
//创建string连接
static void BuildString(int size)
{
string stringObject = "";
for (int i = 0; i <= size; i++)
stringObject += "a";
}
}
}
