ForEach-Parallel-vs-Split-Pipeline.ps1

# ForEach-Object -Parallel is not suitable for many input objects with
# relatively fast processing. Split-Pipeline is very suitable for this.

#requires -version 7.0

$n = $env:NUMBER_OF_PROCESSORS

$1 = {
	$data | Split-Pipeline {process{ }} -Count $n
}

$2 = {
	$data | ForEach-Object -Parallel { } -ThrottleLimit $n
}

$data = 1..10
"1 $((Measure-Command $1).TotalMilliseconds)"
"2 $((Measure-Command $2).TotalMilliseconds)"

$data = 1..100
"1 $((Measure-Command $1).TotalMilliseconds)"
"2 $((Measure-Command $2).TotalMilliseconds)"

$data = 1..1000
"1 $((Measure-Command $1).TotalMilliseconds)"
"2 $((Measure-Command $2).TotalMilliseconds)"

<#
1 33.3961
2 82.3118

1 60.6901
2 833.3839

1 56.8623
2 9144.408
#>