fastest Get-ChildItem

# https://www.reddit.com/r/PowerShell/comments/4lavk7/getfiles_using_robocopy_dir_enumeratefiles_or/

$path = 'c:\temp'

$a1 = New-Object System.Collections.ArrayList
$a2 = New-Object System.Collections.ArrayList
$a3 = New-Object System.Collections.ArrayList
$a4 = New-Object System.Collections.ArrayList
$a5 = New-Object System.Collections.ArrayList

$null = 1..5 | % {
    $a1.Add(
        (Measure-Command {
            # the built-in Get-ChildItem is probably still the fastest
            Get-ChildItem $path -File -Recurse
        }).Ticks
    )
    $a2.Add(
        (Measure-Command {
            # Checks hidden files by default
            Get-Files $path -Method EnumerateFiles -File -Recurse
        }).Ticks
    )
    $a3.Add(
        (Measure-Command {
            # somehow, cmd /c dir is faster than robocopy
            Get-Files $path -Method Dir -File -Recurse
        }).Ticks
    )
    $a4.Add(
        (Measure-Command {
            Get-Files $path -Method AlphaFS -File -Recurse
        }).Ticks
    )
    $a5.Add(
        (Measure-Command {
            # robocopy is the slowest. faster than dir, but only when getting just the name
            Get-Files $path -Method Robocopy -File -Recurse
        }).Ticks
    )
}

($a1 | measure -Sum).sum
($a2 | measure -Sum).sum
($a3 | measure -Sum).sum
($a4 | measure -Sum).sum
($a5 | measure -Sum).sum