Put this in app/start/global.php to get Laravels execution time to the browser console log.
L4
$start = microtime(true); App::finish(function() use ($start) { echo "<script>console.log('App finish: ".round((microtime(true) - $start) * 1000, 3)." ms')</script>"; });
This works with L5:
This page took {{ (microtime(true) - LARAVEL_START) }} seconds to render