并行执行

$throttleLimit = 4
$SessionState =
[system.management.automation.runspaces.initialsessionstate]::CreateDefault()
$Pool
= [runspacefactory]::CreateRunspacePool(1, $throttleLimit, $SessionState,
$Host)
$Pool.Open()

$id = 3
$ScriptBlock = {

#此处参数顺序要注意前后，AddArgument的第一个参数会被传递给$id,AddArgument的第二个参数会被传递给$x，与AddArgument的顺序无关，只与param的顺序有关
param($id,$x)


Start-Sleep -Seconds 1
"Done processing ID $id"
"hello,
$x"
}

$threads = @()

$handles = for ($x = 1; $x -le 20; $x++)
{
$powershell =
[powershell]::Create().AddScript($ScriptBlock).AddArgument($id).addargument($x)

$powershell.RunspacePool = $Pool
$powershell.BeginInvoke()

$threads += $powershell
}

do {
$i = 0
$done = $true

foreach ($handle in $handles) {
if ($handle -ne $null) {
if
($handle.IsCompleted) {
$threads[$i].EndInvoke($handle)

$threads[$i].Dispose()
$handles[$i] = $null
} else {

$done = $false
}
}
$i++
}
if (-not $done) {
Start-Sleep -Milliseconds 500 }
} until ($done)