PS 2.0 傳遞$buffer 速度變慢

經由函數「參數列」傳遞$buffer

function aa($buffer){

write-host "$(get-date)"

}

$buffer = new-object byte[](20MB)

write-host "$(get-date)"

aa $buffer

---

PowerShell 5.0 - 執行正常

PS R:\> .\test.ps1
09/16/2020 12:08:06
09/16/2020 12:08:06

---

PowerShell 2.0 - 速度變慢

PS R:\> powershell -v 2
Windows PowerShell
Copyright (C) 2009 Microsoft Corporation. All rights reserved.

PS R:\> .\test.ps1
09/16/2020 12:08:40
09/16/2020 12:08:47

---

不經由函數「參數列」傳遞$buffer

function aa(){

$buffer = $script:buffer

write-host "$(get-date)"

}

$buffer = new-object byte[](20MB)

write-host "$(get-date)"

aa

---

PowerShell 5.0 - 執行正常

PS R:\> .\test.ps1
09/16/2020 12:42:43
09/16/2020 12:42:43

---

PowerShell 2.0 - 執行正常

PS R:\> powershell -v 2
Windows PowerShell
Copyright (C) 2009 Microsoft Corporation. All rights reserved.

PS R:\> .\test.ps1
09/16/2020 12:42:57
09/16/2020 12:42:57