Is DateTime.Now the best way to measure a function's performance? [closed]

Answer 1

It's useful to push your benchmarking code into a utility class/method. The StopWatch class does not need to be Disposed or Stopped on error. So, the simplest code to time some action is

public partial class With
{
    public static long Benchmark(Action action)
    {
        var stopwatch = Stopwatch.StartNew();
        action();
        stopwatch.Stop();
        return stopwatch.ElapsedMilliseconds;
    }
}

Sample calling code

public void Execute(Action action)
{
    var time = With.Benchmark(action);
    log.DebugFormat(“Did action in {0} ms.”, time);
}

Here is the extension method version

public static class Extensions
{
    public static long Benchmark(this Action action)
    {
        return With.Benchmark(action);
    }
}

And sample calling code

public void Execute(Action action)
{
    var time = action.Benchmark()
    log.DebugFormat(“Did action in {0} ms.”, time);
}