Scalability Pro is our core WordPress optimisation plugin. As we complete performance analysis jobs for clients, we add optimisations for various themes and third-party plugins into Scalability Pro. The only thing we can’t optimise inside Scalability Pro is search and filters, which is why we made Super Speedy Search and Super Speedy Filters to complement Scalability Pro. Performance is how quickly your webpages load, Scalability is how many simultaneous users you can have on your website without crashing.
Scalability Pro focuses on Scalability, so it’s not touching the front-end JavaScript or CSS. However, the primary technique to improve scalability is to fix performance so that it does not degrade as your site grows. This means that if you already have a large website, you will see a big performance boost by using Scalability Pro.
