Booster le démarrage de Powershell v1

Update-gac.ps1

Set-Alias ngen (Join-Path ([System.Runtime.InteropServices.RuntimeEnvironment]::GetRuntimeDirectory()) ngen.exe)
[AppDomain]::CurrentDomain.GetAssemblies() |
sort {Split-path $_.location -leaf} |
%{
$Name = (Split-Path $_.location -leaf)
if ([System.Runtime.InteropServices.RuntimeEnvironment]::FromGlobalAccessCache($_))
{
Write-Host "Already GACed: $Name"
}else
{
Write-Host -ForegroundColor Yellow "NGENing : $Name"
ngen $_.location | %{"`t$_"}
}
}

SOURCE : http://blogs.msdn.com/powershell/archive/2008/09/02/speeding-up-powershell-startup-updating-update-gac-ps1.aspx