性能测试的精确时间测量 [英] Exact time measurement for performance testing

问题描述

查看某项(例如方法调用)在代码中占用多长时间的最准确方法是什么?

What is the most exact way of seeing how long something, for example a method call, took in code?

我猜最简单和最快的方法是:

The easiest and quickest I would guess is this:

DateTime start = DateTime.Now;
{
    // Do some work
}
TimeSpan timeItTook = DateTime.Now - start;

但这有多准确?有没有更好的方法?

But how exact is this? Are there better ways?

推荐答案

更好的方法是使用 Stopwatch 类:

A better way is to use the Stopwatch class:

using System.Diagnostics;
// ...

Stopwatch sw = new Stopwatch();

sw.Start();

// ...

sw.Stop();

Console.WriteLine("Elapsed={0}",sw.Elapsed);

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