With eLearnCommerce 1.12 comes the capability of loading content on demand!
Content load on demand allows you to choose whether you'd like to load your lesson content on page load or on lesson open.
Under normal circumstances, you'll want to load your lesson content on page load so that when your student opens the page with the course, the lesson content loads with the page and is ready for them to use.
However, if you have a very long course with 100+ lessons for example switching the option to load lesson content on Lesson Open will dramatically increase performance.
You can find this option on the right side of the page, between the Lesson Completion and Ready Only option:
NOTE: If you have the Next Lesson button within the lesson enabled in your settings, content load on demand will not work.