Divi Builder: Not an Average Visual Page Builder
A WordPress page builder that features drag-&-drop page builder and that's is also easy to use, looks gorgeous and performs fast at the same time, well it's here and it's called Divi Builder.
Plugin Showcase
Score 100% Page Speed results with Fast Velocity Minify for WordPress
Each and every WordPress theme will definitely make your website looks nice and functional, but in order to improve performance, you'll need a tool or plugin that will minify CSS and JS files. Then combine them and move above the fold so that your website passes Google PageSpeed test with higher score.