When the Wall of Love gets bigger, it takes longer to load all testimonials in just a single load. To improve the performance of the initial loading time, you can add the Load more button.
You will find the option in the Wall of Love grid option. When the checkbox is selected, it will show another input field down below asking how many testimonials are in the initial load of the Wall of Love.
Minimum 20 testimonials in the initial load. For the load more button, every time it's clicked, another 20 testimonials will be loaded.