$url = 'http://www.powershell.com'
 
 
# track execution time:
$timeTaken = Measure-Command -Expression {
  $site = Invoke-WebRequest -Uri $url
}
 
$milliseconds = $timeTaken.TotalMilliseconds
 
$milliseconds = [Math]::Round($milliseconds, 1)
 
"This took $milliseconds ms to execute"