Is `DateTime.Now` the Best Way to Measure Function Performance?

Performance of the function of accurate measurement: The method that surpasses datetime.now

When looking for performance bottlenecks, it is important to choose the right time method. Many developers depend on to measure functional performance. But is this the most accurate way?

The use of may have defects. DateTime.Now usually involve time processing and adjustment, such as time zone conversion and summer time (DST) considerations. This expenses will be delayed to the measurement process.

In order to obtain more accurate performance evaluation, consider using the DateTime.Now class in the DateTime.Now.

Provides a high -precision chronograph mechanism to solve the limitations of

. The following code fragment demonstrate its usage: System.Diagnostics Stopwatch Stopwatch The availability of high -precision timers on the hardware on the hardware and use them accordingly. In addition, DateTime.Now usually has a higher resolution than

because it does not have an overhead related to time zone.

<code class="language-csharp">Stopwatch sw = Stopwatch.StartNew();
// 执行操作
sw.Stop();
Console.WriteLine("耗时：{0}ms", sw.Elapsed.TotalMilliseconds);</code>

In short, although Stopwatch can provide basic timing functions, DateTime.UtcNow provides higher accuracy and reliability, making it the first choice for precise evaluation function performance. DateTime.Now

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