Stopwatch.IsHighResolution 字段

定义

命名空间:

System.Diagnostics

程序集:

System.Runtime.dll

Source:

Stopwatch.cs

指示计时器是否基于高分辨率性能计数器。 此字段为只读。

public: static initonly bool IsHighResolution;

public static readonly bool IsHighResolution;

 staticval mutable IsHighResolution : bool

Public Shared ReadOnly IsHighResolution As Boolean 

字段值

Boolean

示例

以下示例显示计时器的频率和分辨率 Stopwatch 。 此代码示例是为 Stopwatch 类提供的一个更大示例的一部分。

void DisplayTimerProperties()
{
   // Display the timer frequency and resolution.
   if ( Stopwatch::IsHighResolution )
   {
      Console::WriteLine( "Operations timed using the system's high-resolution performance counter." );
   }
   else
   {
      Console::WriteLine( "Operations timed using the DateTime class." );
   }

   Int64 frequency = Stopwatch::Frequency;
   Console::WriteLine( "  Timer frequency in ticks per second = {0}", frequency );
   Int64 nanosecPerTick = (1000L * 1000L * 1000L) / frequency;
   Console::WriteLine( "  Timer is accurate within {0} nanoseconds", nanosecPerTick );
}

public static void DisplayTimerProperties()
{
    // Display the timer frequency and resolution.
    if (Stopwatch.IsHighResolution)
    {
        Console.WriteLine("Operations timed using the system's high-resolution performance counter.");
    }
    else
    {
        Console.WriteLine("Operations timed using the DateTime class.");
    }

    long frequency = Stopwatch.Frequency;
    Console.WriteLine("  Timer frequency in ticks per second = {0}",
        frequency);
    long nanosecPerTick = (1000L*1000L*1000L) / frequency;
    Console.WriteLine("  Timer is accurate within {0} nanoseconds",
        nanosecPerTick);
}

Public Shared Sub DisplayTimerProperties()

   ' Display the timer frequency and resolution.
   If Stopwatch.IsHighResolution Then
      Console.WriteLine("Operations timed using the system's high-resolution performance counter.")
   Else
      Console.WriteLine("Operations timed using the DateTime class.")
   End If
   
   Dim frequency As Long = Stopwatch.Frequency
   Console.WriteLine("  Timer frequency in ticks per second = {0}", frequency)
   Dim nanosecPerTick As Long = 1000000000 / frequency
   Console.WriteLine("  Timer is accurate within {0} nanoseconds", nanosecPerTick)

End Sub

注解

类使用的 Stopwatch 计时器取决于系统硬件和操作系统。 IsHighResolution如果trueStopwatch计时器基于高分辨率性能计数器，则为 。 否则， IsHighResolution 为 false，指示 Stopwatch 计时器基于系统计时器。

另请参阅

• Frequency