PWSH ForEach-Object -Parallel

• 22 August 2023

When using PowerShell and multiple commands that can be executed in parallel use ForEach-Object -Parallel {}.

Tips:

• Use $_ to access the current element
• Use using: syntax to access variables defined and assigned outside the parallel scope, e.g. $using:MyVariable

A clean example from the documentation is:

$Message = "Output:"

1..8 | ForEach-Object -Parallel {
    "$using:Message $_"
    Start-Sleep 1
} -ThrottleLimit 4

Output: 1
Output: 2
Output: 3
Output: 4
Output: 5
Output: 6
Output: 7
Output: 8

Reference

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