cmdlet是在Windows PowerShell环境中使用的轻量级命令。Windows PowerShell运行时在命令行提供的自动化脚本上下文中调用这些 cmdlet。Windows PowerShell运行时还通过^{(Windows PowerShell)}Windows PowerShell API^{(Windows PowerShell APIs)}以编程方式调用它们。在今天的博文中，我们将找出原因，然后针对Windows上签名的^(Windows)PowerShell cmdlet^{(PowerShell cmdlets)}比未签名的 cmdlet 运行速度慢的问题提供解决方法。

Cmdlet 执行操作，通常将Microsoft .NET Framework对象返回到管道中的下一个命令。要编写 cmdlet，您必须实现派生自两个专用 cmdlet 基类之一的 cmdlet 类。派生类必须：

• 声明^(Declare)一个将派生类标识为 cmdlet 的属性。
• 定义^(Define)用将公共属性标识为 cmdlet 参数的属性修饰的公共属性。
• 覆盖一种或多种输入处理方法来处理记录。

签名的PowerShell cmdlet 运行速度比未签名的 cmdlet 慢

您会注意到签名的Windows PowerShell cmdlet 的运行速度比未签名的 cmdlet 慢。

出现此问题的原因是计算机无法连接到以下地址以进行证书信任列表^{(Certificate Trust List)}( CTL ) 验证：

http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab

http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab

当存在网络问题时会发生这种情况。例如，代理设置不正确。

要解决此问题，请执行以下操作：

• 按Windows键 + R。在“运行”^(Run)对话框中，键入gpedit.msc并按 Enter 以打开“本地组策略编辑器”^{(open Local Group Policy Editor)}。
• 导航到以下路径：

Computer Configuration > Windows Settings > Security Settings > Public Key Policies

• 在右侧的详细信息窗格中，双击Certificate Path Validation Settings。
• 选择网络检索^{(Network Retrieval)}选项卡。
• 选中定义这些策略设置^{(Define these policy settings)}复选框。
• 取消选中Microsoft 根证书计划（推荐）中的自动更新证书^{(Automatically update certificates in the Microsoft Root Certificate Program (recommended) )}复选框。
• 单击应用^(Apply)>确定。^(OK.)

您现在可以退出本地组策略编辑器^{(Local Group Policy Editor)}。

That’s it!

Fix: Signed PowerShell cmdlets run slower than unsigned cmdlets

Α cmdlet is a lightweight command that is used in the Windows PowerShell environment. The Windows PowerShell runtime invokes these cmdlets within the context of automation scripts that are provided at the command line. The Windows PowerShell runtime also invokes them programmatically through Windows PowerShell APIs. In today’s post, we will identify the cause and then provide the workaround to the issue of signed PowerShell cmdlets run slower than unsigned cmdlets on Windows.

Cmdlets perform an action and typically return a Microsoft .NET Framework object to the next command in the pipeline. To write a cmdlet, you must implement a cmdlet class that derives from one of two specialized cmdlet base classes. The derived class must:

• Declare an attribute that identifies the derived class as a cmdlet.
• Define public properties that are decorated with attributes that identify the public properties as cmdlet parameters.
• Override one or more of the input processing methods to process records.

Signed PowerShell cmdlets run slower than unsigned cmdlets

You’ll notice that signed Windows PowerShell cmdlets are running more slowly than unsigned cmdlets.

This issue occurs because the computer cannot connect to the following addresses for Certificate Trust List (CTL) verification:

http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab

http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab

This occurs when a network issue exists. For example, there are incorrect proxy settings.

To work around this issue, do the following:

• Press Windows key + R. In the Run dialog box, type gpedit.msc and hit Enter to open Local Group Policy Editor.
• Navigate to the path below:

Computer Configuration > Windows Settings > Security Settings > Public Key Policies

• In the details pane on the right, double-click Certificate Path Validation Settings.
• Select the Network Retrieval tab.
• Check the Define these policy settings checkbox.
• Uncheck the Automatically update certificates in the Microsoft Root Certificate Program (recommended) checkbox.
• Click Apply > OK.

You can now exit Local Group Policy Editor.

That’s it!

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