PS Speed Test ForEach vs Function.ps1

function Get-Double ($number){$number + $number}

function Get-Double2
{
    <#
    .SYNOPSIS

    .EXAMPLE
    New-Function -ComputerName server
    .EXAMPLE
 
    .NOTES

    #>
    [cmdletbinding()]
    param(
        # Pipeline variable
        [Parameter(
            Mandatory         = $true,
            HelpMessage       = ' ',
            Position          = 0,
            ValueFromPipeline = $true
        )]
        [Alias('value')]
        [int[]]$Number
    )

    process
    {
        foreach($node in $Number)
        {
            $node + $node
        }
    }
}


$max = 100000

Measure-Command  {
    0..$max | %{$_ + $_}
} | FT t*seconds


Measure-Command  {
    $list = 0..$max 
    foreach($item in $list)
    {
        $item + $item
    }
} | FT t*seconds


Measure-Command  {
    (0..$max).ForEach({
        $_+ $_
    })
} | FT t*seconds


Measure-Command  {
    0..$max | %{ Get-Double $_}
} | FT t*seconds


Measure-Command  {
    0..$max | %{ Get-Double2 $_}
} | FT t*seconds


Measure-Command  {
    0..$max | Get-Double2
} | FT t*seconds