This just take valid website /wp-admin/install.php Like this http://199.119.202.202/wp-admin/install.php
Not Like this http://194.83.242.101/wp-admin/install.php .
This script is fast if your domain list is valid wordpress or you could say it's not mixed with other cms like joomla, drupal, etc.
What makes it a little slow is a dead or inaccessible domain.
https://www.trenggalek6etar.id/2018/08/wp-install-mass-scanner-bash-script.html