How to show render time / page load time in Laravel?

I would recommend barryvdh/laravel-debugbar package which can give you plenty of informations about request including executed queries, various load times and many more.

Laravel defines a LARAVEL_START constant which contains the microtime of when the framework started booting. You could use that to calculate the difference.

You can use the following

This page took {{ (microtime(true) - LARAVEL_START) }} seconds to render