Optimize Assemblies & generate native .NET images for CPU

OptimizeAssemblies.ps1

# generate native .NET images for CPU
function Optimize-Assemblies {
    [CmdletBinding()]
    param (
        [string]$AssemblyFilter = "Microsoft.PowerShell.",
        [string]$Activity = "Native Image Installation"
    )

    try {
        # Try to get ngen.exe from the Visual Studio environment
        $ngenPath = Get-Command ngen.exe -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Source

        # If not found, fallback to .NET Framework directory
        if (-not $ngenPath) {
            $ngenPath = 'C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\ngen.exe'
        }

        # Check if ngen.exe exists
        if (-not (Test-Path $ngenPath)) {
            Write-Error "Ngen.exe not found. Make sure .NET Framework is installed and the Visual Studio environment is loaded."
            return
        }

        Write-Verbose "Using ngen.exe from: $ngenPath"

        # Get a list of loaded assemblies
        $assemblies = [AppDomain]::CurrentDomain.GetAssemblies()

        # Filter assemblies based on the provided filter
        $filteredAssemblies = $assemblies | Where-Object { $_.FullName -like "$AssemblyFilter*" }

        if ($filteredAssemblies.Count -eq 0) {
            Write-Warning "No matching assemblies found for optimization."
            return
        }

        $totalAssemblies = $filteredAssemblies.Count
        $currentAssembly = 0

        foreach ($assembly in $filteredAssemblies) {
            $currentAssembly++
            
            # Get the name of the assembly
            $name = [System.IO.Path]::GetFileName($assembly.Location)

            # Display progress
            $percentComplete = ($currentAssembly / $totalAssemblies) * 100
            Write-Progress -Activity $Activity -Status "Optimizing $name" -PercentComplete $percentComplete

            # Run ngen install
            $output = & $ngenPath install $assembly.Location 2>&1

            # Check for errors
            if ($LASTEXITCODE -ne 0) {
                Write-Warning "Error optimizing $name. Error: $output"
            }
            else {
                Write-Verbose "Successfully optimized $name"
            }
        }
    }
    catch {
        Write-Error "An error occurred: $_"
    }
    finally {
        Write-Progress -Activity $Activity -Completed
    }
}