Get-DesktopVM Slow

Hi

I have 12 pools in View server. Enumerating the desktops using "Get-DesktopVM" for these pools seems very slow in a powershell script. I'm passing pool_id to Get-DesktopVM cmdlet as argument in a loop with list of pool ids. Is there any recommendations available / hotfix to speedup this enumeration? If the underlying vCenter is constrained on resources, will it affect this behavior?