Measure-ProcessMemoryUsage.ps1

$counters = (Get-Counter -ListSet Process).Counter | ? {$_ -like "*Bytes"} | % {$_.Replace('*','Powershell*')}
[string[]]$CounterNames = $counters | % {$_.split('\')[-1].ToLower()}
[string[]]$itemProperties = @()
$itemProperties += 'Timestamp'
$itemProperties += $CounterNames | ForEach-Object {$_.Replace('bytes','(MB)')}
$blankItem = '' | Select $itemProperties
Get-Counter -Counter $counters -SampleInterval 2 -Continuous| % {
    $item = $blankItem
    $item.Timestamp = $_.Timestamp
    $groups = $_.countersamples | Group-Object {Split-Path $_.Path -Leaf}
    foreach ($CounterName in $CounterNames) {
        $item.$($CounterName.Replace('bytes','(MB)')) = (($groups | Where-Object {$_.Name -eq $CounterName}).Group | Measure-Object -Sum CookedValue).Sum/1MB
    }
    $item
} | Out-GridView