Moodle is undoubtedly the best open-source learning platform, with 248, 250, 478 users (and counting) in 251 countries around the world. And 196, 000+ sites use Moodle for their online learning and development. Those numbers for an open-source technology are overwhelmingly incredible!
Your Moodle LMS's performance will be mainly a point of concern as you grow your user-base. There are several things that play a key role in your Moodle Learning Management System's (simply Moodle) performance.