gistfile1.php

<?
class StatsScreen extends Screen
{
	private $start;
	
	public function before($controller,$metadata,&$data)
	{
		$this->start=microtime(true);
	}
	
	public function after($controller,$metadata,&$data)
	{
		$data['execution_time']=microtime(true)-$this->start;
	}
}