As a webmaster, you can make your site load much faster with manual optimization. You can replace the images with ones that are compressed to just the right balance of visual clarity and small file size. You can inline small images, turning <img src="tiny-image.jpg"> into <img src="data:image/jpeg;base64,/9j/4AAQSkZJR...">. You can minify your javascript, css, and html so there's no whitespace or other unneeded characters. You can do this, but it's a lot of work and you need to learn a lot about web performance to do it well. Alternately, if you're using Apache, you can install mod_pagespeed to automatically apply these and other optimizations to your site.

But what if you're using nginx? While it's only the #2 server, behind Apache, it's disproportionately popular among people who care about speed. So: I'm working on an nginx port: ngx_pagespeed.