生词解释:Diagnostics[,daɪəg'nɑstɪks] n.诊断学
using System.Diagnostics; Stopwatch sw = new Stopwatch ();
sw.Start (); string str = "a";
for (var i = ; i < ; i++) {
str += "b";
}
sw.Stop ();
Console.WriteLine (sw.Elapsed); // 输出 从 Start() 到 Stop() 之间经过时间。(单位:秒)
还一个也很方便的。
long startTime = DateTime.Now.Millisecond;
string str = "abc";
for (var i = ; i < ; i++)
{
str += "abc";
}
long endTime = DateTime.Now.Millisecond;
Console.Write(str);
Console.WriteLine("str 拼接1000次,用时:{0}毫秒。", endTime - startTime); startTime = DateTime.Now.Millisecond;
str = "";
for (var i = ; i < ; i++)
{
str += 'a';
}
endTime = DateTime.Now.Millisecond;
Console.Write(str);
Console.WriteLine("str 拼接100次,用时:{0}毫秒。", endTime - startTime);