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using
System;
using
System.Diagnostics;
namespace
ConsoleApplication1
{
class
Program
{
private
const int N = 10000000;
private
static Stopwatch watch = new
Stopwatch();
static
void Main(string[] args)
{
string
source = "abcdefghijklmnopqrstuvwxyz0123456789C#"
+ "中查询字符串中是否包含指定字符/串，使用IndexOf还是Contains?.uonun";
string
target = "a";
Console.WriteLine("目标为第一个字符时：");
TestContains(source, target);
TestIndexOf(source, target);
Console.WriteLine();
Console.WriteLine("目标为中部某个字符时：");
target = "中";
TestContains(source, target);
TestIndexOf(source, target);
Console.WriteLine();
Console.WriteLine("目标为最后一个字符时：");
target = "u";
TestContains(source, target);
TestIndexOf(source, target);
Console.WriteLine("执行完毕，按任意键退出...");
Console.ReadKey();
}
private
static void TestIndexOf(string
source, string
target)
{
watch.Reset();
watch.Start();
for
(int
i = 0;i < N;i++)
{
source.IndexOf(target);
}
watch.Stop();
Console.WriteLine("IndexOf: "
+ watch.ElapsedMilliseconds.ToString() + "ms");
return;
}
private
static void TestContains(string
source, string
target)
{
watch.Reset();
watch.Start();
for
(int
i = 0;i < N;i++)
{
source.Contains(target);
}
watch.Stop();
Console.WriteLine("Contains: "
+ watch.ElapsedMilliseconds.ToString() + "ms");
return;
}
}
}
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