Data limit when using "Get-PWDocumentsBySearch" and flag "-Attributes"

As per the title, has anyone else encountered this? I have found that when performing a document search including attributes, if the search returns a large number of files then processing will stop. The interim measure I have used as a work-around to avoid this is to first return a list of documents, then loop through each document and return the attributes like so:

$docs = Get-PWDocumentsBySearch -FolderID 24391 -Attributes @{ShareFileTrigger=1}

foreach ($i in $docs)
{
    $doc = Get-PWDocumentsBySearch -FileName $i.FileName -FolderID $i.ProjectID -JustThisFolder -GetAttributes
}

However the above listed code has to perform 2 search operations so there is a significant performance hit due to double handling. Does anyone know of a better solution to this problem? 

Additionally, is there anywhere that we can view the source code of the pwps_dab cmdlets?

I'd be interested to see how it is returning the data as it reminds me a lot of an issue that I encountered previously with WScript.Shell.Exec() where if you use StdOut.ReadAll at the end of the process and the TextStream is large enough it will hit a memory limit and stop processing. The solution to that problem was to instead use StdOut.ReadLine() and add each line to a collection for later use; freeing up the StdOut memory for more incoming data:

Do While Not exec.StdOut.AtEndOfStream
    output.Add exec.StdOut.ReadLine()
Loop

If anyone has any suggestions or knowledge on the matter it would be greatly appreciated!
Thanks,

Edward