what is the best way to in powershell for finding only folder in term of time performance

Question

I have an issue, where I have to purge folders, the name of the folders are most of the time formated and I did a script in powershell to do that. But I understood that even if I do : Get-ChildItem -Path $array[2] -Recurse -Directory the command will check every item in every folder even if that is not a folder, and that is leading to some hours to get every folder path.

how should I do to permit that to perform in term of time ?

here is a part of the script

foreach ($line in Get-Content ".\Exe-Purge-directories.txt") {

    $array = $line.Split("|")
    $deleteType = $array[0]
    $sdate = [int]$array[1] * -1 # nb de jour a retrancher ( nb negatif)
    $expiredDate = (Get-Date).AddDays($sdate) # today + date a retrancher 
    $folders = Get-ChildItem -Path $array[2] -Recurse -Directory -Force -ErrorAction SilentlyContinue
    #the line above is the one taking time  
    $pathException = Get-ChildItem -Path $array[2] -File #-Force #-ErrorAction SilentlyContinue
    
    if ($deleteType.Equals("DateTimeInFolderName")) {
        foreach ($folder in $folders) {
                     if ($folder.Name -match '^\d{4}-\d{2}$')
            # .....

Answer 1

thanks to your advices, I have done a recursive function. here it is, I know it's not perfect, but if someone gets to have the same problem, here what worked for me as my folders name have formatted name

function Recursive-FolderSearch {
param (
    [string[]]$Paths,  
    [string]$expiredDate  
)

foreach ($Path in $Paths) {
    
    if ((Test-Path $Path -PathType Container) -and (Split-Path $Path -Leaf) -match '^\d{4}-\d{2}$') {
        
        $folderDays = Get-ChildItem -Path $Path -Attributes Directory
        foreach ($folderDay in $folderDays) {
            if ($folderDay.Name -match '^\d{2}$') {# if folder respect format DD
                # concat folder AAAA-MM and folder format DD to get complete date
                $dateDossier = [datetime]::ParseExact("$(Split-Path $Path -Leaf)-$($folderDay.Name)", "yyyy-MM-dd", $null)
                if ($dateDossier -lt $expiredDate) { #compare folder date with actual date 
                # then suppress folder if older than requested
                    Remove-Item -Path $folderDay.FullName -Recurse -Force -ErrorAction SilentlyContinue
                }
            }
        }
        #Supprimer le dossier AAAA-MM s'il est vide
        if (-not (Get-ChildItem -Path $Path -Force -Recurse -ErrorAction SilentlyContinue  )) { #| Where-Object { $_. PSIsContainer -eq $true }
            Remove-Item -Path $Path -Force -Recurse -ErrorAction SilentlyContinue
        }
    
    } 
    elseif (Test-Path $Path -PathType Container) {
        $subDirs = Get-ChildItem -Path $Path -Attributes Directory -Force

        foreach ($subDir in $subDirs) {
            Recursive-FolderSearch -Paths $subDir.FullName $expiredDate
        }
    } 
}

}