Multi-threading or Using Jobs

You could also look at PowerShell Workflows with the -parallel & -throttlelimit switches. Here's something I did with running multiple scanrefs.exe instances in parallel.

Workflow Scan-ReferencesMultithreaded {
    Param ( 
        [Parameter (Mandatory)]
        [String] $Datasource,

        [Parameter (Mandatory)]
        [String] $UserName,

        [Parameter (Mandatory)]
        [String] $Password,

        [Parameter (Mandatory)]
        [String[]] $DocumentGUIDs
    )
    $Threads = 4
    $FilePath = 'C:\Program Files (x86)\Bentley\ProjectWise\bin\scanrefs.exe'

    foreach -parallel -throttlelimit $Threads ($DocumentGUID in $DocumentGUIDs) {
        $Params = @{
            FilePath     = 'C:\Program Files (x86)\Bentley\ProjectWise\bin\scanrefs.exe'
            ArgumentList = @('-d', $Datasource,
                             '-u', $UserName,
                             '-p',  $Password,
                             '-mode', 'references',
                             '-masters', "{$DocumentGUID)}",
                             '-priority', "`"r:FolderPath`"",
                             '-order', 'priority'
                            )
            Wait         = $true
            WindowStyle  = [System.Diagnostics.ProcessWindowStyle]::Hidden
        }
        $Process = Start-Process @Params
    }
}

Ohhh, I like that, but isn't ForEach -Parallel a PowerShell 7 feature? I don't see it when i do Help Foreach-Object in my PowerShell 5.1. This script doesn't require it, but do you have PWPS_DAB working with PowerShell 7? I haven't tried in a while but it didn't work for me when I last tried a few years agao.

Ohhh, I like that, but isn't ForEach -Parallel a PowerShell 7 feature? I don't see it when i do Help Foreach-Object in my PowerShell 5.1. This script doesn't require it, but do you have PWPS_DAB working with PowerShell 7? I haven't tried in a while but it didn't work for me when I last tried a few years agao.

I'm using PowerShell 5.1 as well and I think the -parallel switch is only available within the context of a Workflow function. This wasn't specifically using PWPS_DAB cmdlets and I think with Scope issues you might need to handle datasource login within the foreach loop as well so may have limited use depending on the task at hand.