Optimizing PowerShell Performance

by May 21, 2012

PowerShell is loading .NET assemblies. These assemblies can be precompiled using the tool ngen.exe which improves loading times (because the DLLs no longer have to be compiled each time they are loaded).

Before you think about optimizing the DLLs PowerShell uses, you should do some reading on ngen.exe and its benefits. Then, you could use the following code to optimize all DLLs loaded by PowerShell. You do need Administrator privileges for this.

$NGENPath = Join-Path $FrameworkDir 'ngen.exe'

[AppDomain]::CurrentDomain.GetAssemblies() |
  Select-Object -ExpandProperty Location |
  ForEach-Object {
    & $NGENPath """$_"""

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