Speed of retrieving list of documents

I have a folder with 680 documents.  There's no sub folders.  Two of the files are nearly 1 gig each (but I don't think that should matter).

I've tried both Get-PWDocumentsBySearch (with -slow because I need the custom attributes) and Get-PWDocumentsByGUIDs 

It's taking between 5 and 10 min to create the list of files.  Is that timeframe normal, and is there a faster way?