PowerShell slow Invoke-Command

Question

I'm writing a PowerShell-Script that reads all shares from all AD-Servers and outputs them into a csv-file. At the same time the script is saving all occuring errors and outputs them into an error-log. Can you guys see any possibility that could fasten up the whole process, because right now it takes quite a long time.

My code:

    function output1 {

        Get-Content C:\PowerShell\Shares\serverlist.txt | Where-Object { $_.name -like "*" } | ForEach-Object {

            $ErrorActionPreference = 'silentlycontinue'
            $name = $_ + ".domain.com"
            $pathnotnull = $_.Path -ne ""

            invoke-command -ComputerName $name -ArgumentList $name, $pathnotnull -ScriptBlock { 

                param($name, $pathnotnull)
                Get-SmbShare | where-object { $_.Path -ne '' } | Select-Object -Property "Name", "Path" | get-acl | Select-Object -Property "PSChildName", "Path", "Group", "AccessToString" 
                
            }

            if (!$?) {
                if ($error[0].exception.message) { Write-Host "Access to $_ failed!" -ForegroundColor Red }
                $error | Set-Content $error_logfile -Encoding Unicode
            }
            else {
                Write-Host "Access to $_ successful!" -ForegroundColor Green
                return $i
            }
        }

    
    }
    
    $i = output1
    $i | Out-Null
    $ErrorActionPreference = 'silentlycontinue'

    if ($i -ne $null) {
        $i | export-csv -path C:\PowerShell\Shares\shares.csv -NoTypeInformation -delimiter ";"
    }
    else {
        ""
        write-host "No server could be contacted!" -ForegroundColor Red
        ""
        openerrorlog1
    }