Measure PowerShell command performance in SPE.

MeasureCommandPerformance.ps1

$path = "master:\"
$identity = "admin"

$time1 = Measure-Command -Expression {
    Get-ChildItem -Path $path -Recurse | Where-Object { $_.__lock -eq $identity }
}

$time2 = Measure-Command -Expression {
    $query = "fast://*[@__lock='%$($identity)%']"
    Get-Item -Path $Path -Query $query
}

Write-Verbose "Get-ChildItem time: $($time1.TotalSeconds) seconds" -Verbose
Write-Verbose "Get-Item with fast query time: $($time2.TotalSeconds) seconds" -Verbose