Defer Iframes loading
Improve Magento sites ranking with major search engines
Dramatically improve execution and rendering time which helps engage more customers
Fix all the problems with Full Page Cache module and it works perfectly with FPC module.
Effective Magento site speed improvement
The fact that scripts must be downloaded, parsed, and executed before the browser can begin to render a web page causes much of delay in time to load the main page at the startup. That ugly truth can make your customers leave your site at their first visit as many studies have shown that users will not tolerate more than a 4 second load time.