PowerShell Invoke-Command performance issue

Question

There are a few computers on my domain that I have access to remote into with PowerShell. I'm getting extremely slow performance when I remote into a particular computer with a command like this:

Invoke-Command -ComputerName someComputerName -ScriptBlock { ls C:\ } -credential myUsername

It takes about 10 seconds to display each file/folder on the drive. If I run the same command from within a session using Enter-PSSession then there are no performance issues. Also if I run a command like Get-Alias with Invoke-Command there are no performance issues. Lastly I can run any command on any other computer without any performance issues.

Any idea what could be causing this? Thanks!

mjolinor · Accepted Answer · 2013-10-14 15:40:58Z

2

Could be a bandwidth issue. Does this run any faster?

convertfrom-csv (Invoke-Command -ComputerName someComputerName -ScriptBlock { ls C:\ | convertto-csv} -credential myUsername)

answered Oct 14, 2013 at 15:40

mjolinor

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2 Comments

rob Over a year ago

Yes that command runs almost instantly. Is this faster because the csv representation of these files is much smaller than the object representation? Any idea what could be causing a bandwidth issues like this? Thanks!

mjolinor Over a year ago

Yes, the XML payload for that csv is much smaller than the XML payload for the FileInfo objects. You can verify this yourself by using export-clixml on both, and noting the file sizes. You might want to fire up a packet analyzer to see what's going on with the network.

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