vb.net - 这些 VB.NET 方法是否更快：SaveSetting() 或 SetValue()？

Question

我在注册表中更新了很多应用程序的指标，并且想知道哪种写入系统注册表的方法明显更快。

Answer 1

如果您使用 .NET 反编译器查看命名空间Interaction下的类/模块的源代码Microsoft.VisualBasic，您会发现该SaveSetting()方法实际上SetValue()在后台使用：^*

/// <summary>Saves or creates an application entry in the Windows registry. The My feature gives you greater productivity and performance in registry operations than SaveSetting. For more information, see <see cref="P:Microsoft.VisualBasic.Devices.ServerComputer.Registry" />.</summary>
/// <param name="AppName">Required. String expression containing the name of the application or project to which the setting applies.</param>
/// <param name="Section">Required. String expression containing the name of the section in which the key setting is being saved.</param>
/// <param name="Key">Required. String expression containing the name of the key setting being saved.</param>
/// <param name="Setting">Required. Expression containing the value to which <paramref name="Key" /> is being set.</param>
/// <exception cref="T:System.ArgumentException">Key registry could not be created, or user is not logged in.</exception>
/// <filterpriority>1</filterpriority>
/// <PermissionSet>
///   <IPermission class="System.Security.Permissions.RegistryPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public static void SaveSetting(string AppName, string Section, string Key, string Setting)
{
    Interaction.CheckPathComponent(AppName);
    Interaction.CheckPathComponent(Section);
    Interaction.CheckPathComponent(Key);
    string text = Interaction.FormRegKey(AppName, Section);
    RegistryKey registryKey = Registry.CurrentUser.CreateSubKey(text);
    if (registryKey == null)
    {
        throw new ArgumentException(Utils.GetResourceString("Interaction_ResKeyNotCreated1", new string[]
        {
            text
        }));
    }
    try
    {
        registryKey.SetValue(Key, Setting);
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        registryKey.Close();
    }
}

或者在 VB 中，如果您愿意：

''' <summary>Saves or creates an application entry in the Windows registry. The My feature gives you greater productivity and performance in registry operations than SaveSetting. For more information, see <see cref="P:Microsoft.VisualBasic.Devices.ServerComputer.Registry" />.</summary>
''' <param name="AppName">Required. String expression containing the name of the application or project to which the setting applies.</param>
''' <param name="Section">Required. String expression containing the name of the section in which the key setting is being saved.</param>
''' <param name="Key">Required. String expression containing the name of the key setting being saved.</param>
''' <param name="Setting">Required. Expression containing the value to which <paramref name="Key" /> is being set.</param>
''' <exception cref="T:System.ArgumentException">Key registry could not be created, or user is not logged in.</exception>
''' <filterpriority>1</filterpriority>
''' <PermissionSet>
'''   <IPermission class="System.Security.Permissions.RegistryPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
''' </PermissionSet>
Public Sub SaveSetting(AppName As String, Section As String, Key As String, Setting As String)
    Interaction.CheckPathComponent(AppName)
    Interaction.CheckPathComponent(Section)
    Interaction.CheckPathComponent(Key)
    Dim text As String = Interaction.FormRegKey(AppName, Section)
    Dim registryKey As RegistryKey = Registry.CurrentUser.CreateSubKey(text)
    If registryKey Is Nothing Then
        Throw New ArgumentException(Utils.GetResourceString("Interaction_ResKeyNotCreated1", New String() { text }))
    End If
    Try
        registryKey.SetValue(Key, Setting)
    Catch ex As Exception
        Throw ex
    Finally
        registryKey.Close()
    End Try
End Sub

因此，我希望它们在这种特殊情况下具有相同的性能（假设您将基本上复制相同的行为）。但是，Microsoft.Win32.Registry类（或My.Computer.Registry属性，它只是上述类的包装器）将更加灵活，并提供更多选项，如文档（感谢 Jimi！）和上面显示的 XML 注释中所述。

至于性能，要 100% 确定（假设您确实需要），那么您应该始终测量。

---

^* _{此代码是使用ILSpy提取的。}