php artisan cron is a daemon command that runs the schedule:run command.
Use this package instead of adding php artisan schedule:run to your crontab file.
Run this command under supervisor so that it will automatically restart should any crash occur.
You can use the --interval flag to set the interval between schedule:run calls.
By default, this is every 60 seconds, however it can be changed to any interger second value.
php artisan cron --interval=15 would run the scheduled commands every 15 seconds.
This is helpful if you want a finer granuality than a typical cron gives you.
By default this command outputs a progress bar showing how long until the next trigger, if you do not want this (eg, in production), use the --quiet flag.