Stops idle/crashed processes by Process Name via PowerShell

Stop-IdleProcess.ps1

<#
.SYNOPSIS
Stops idle/crashed processes by Process Name

.DESCRIPTION
This function will stop and idle or crashed processed with the passed ProcessName.
To detect idle processes, it will first gather an initial list of processes, sleep
for a period of time then refetch the list. If any of the new list are identical
to the initial list, then these processes are stopped as they're deemed idle.

WARNING: A process that is running but just left in the background is deemed "idle",
so will be killed by this function. This script is to on be used for very specific
processes that are known to run and then just stop idlely or crash.

.PARAMETER ProcessName
Specifies the name of the processes to find and stop

.PARAMETER SleepTime
Specifies a period of time, in seconds, for which to sleep. Default is 10 seconds

.EXAMPLE
PS> Stop-IdleProcess -ProcessName 'nunit-agent'
#>
function Stop-IdleProcess
{
    param(
        [Parameter(Mandatory=$true)]
        [ValidateNotNullOrEmpty()]
        [string]
        $ProcessName,

        [int]
        $SleepTime = 10
    )

    # Get the list of initial processes
    $initialProcesses = (Get-Process -Name $ProcessName -ErrorAction SilentlyContinue | Select-Object NPM, CPU, Id)

    # If there are no processes, return
    if (($initialProcesses | Measure-Object).Count -eq 0)
    {
        Write-Host "No processes found for $ProcessName"
        return
    }

    # Sleep for a period of time
    Start-Sleep -Seconds $SleepTime

    # Now refetch the list of processes
    $newProcesses = (Get-Process -Name $ProcessName -ErrorAction SilentlyContinue | Select-Object NPM, CPU, Id)

    # If there are no processes, then they've all finished so none idle
    if (($newProcesses | Measure-Object).Count -eq 0)
    {
        Write-Host "All $ProcessName processes have finished"
        return
    }

    # Otherwise, we need to find process with the same ID/NPM and CPU, as these are idle/crashed
    foreach ($new in $newProcesses)
    {
        # Find the process from the initial ones
        $match = $initialProcesses | Where-Object { $_.NPM -eq $new.NPM -and $_.CPU -eq $new.CPU -and $_.Id -eq $new.Id } | Select-Object -First 1

        # If there isn't one, continue
        if ($match -eq $null)
        {
            continue
        }

        # Otherwise, stop the process as it's crashed
        Write-Host "Stopping $ProcessName process with ID: $($match.Id)"
        Stop-Process -Id $match.Id -Force | Out-Null
    }
}