New-UsingBlock and BulkUpdateContext changes Context User

New-UsingBlock with BulkUpdateContext

function New-UsingBlock {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)]
        [IDisposable]
        $InputObject,
  
        [Parameter(Mandatory = $true)]
        [ScriptBlock]
        $ScriptBlock
    )
 
    try {
        $ScriptBlock.Invoke()
    } finally {
        if ($InputObject) {
            $InputObject.Dispose()
        }
    }
}

Get-ChildItem -Path "master:\content\home" | % { Remove-Item -Path $_.ItemPath }

$watch = New-Object System.Diagnostics.Stopwatch

$watch.Start()
New-UsingBlock (New-Object Sitecore.Data.BulkUpdateContext) {
    [Sitecore.Context]::User.Name
    for($i = 1; $i -lt 10; $i++) {
        $item = New-Item "master:/content/home/sample item $($i)" -Type "/sitecore/templates/Sample/Sample Item"
        $item.Editing.BeginEdit()
        $item["Title"] = "Sample Item $($i)"
        $item["Text"] = "Sample Item $($i)"
        $item.Editing.EndEdit() | Out-Null
    }
    [Sitecore.Context]::User.Name
}
$watch.Stop()
Write-Host $watch.Elapsed