Use to do that myself. Mac Plus 400k floppy RAMdisk. Later setting aside 10MB RAM for web cache. A large cache folder could in past make it slow with disk seeks to find files. A fast internet will also affect loading or reloading web content. I found that filtering ads can have a noticeable impact on page loading as well - can't use some sites and web in general with all the ads and their scripts. As well as how ads and ad servers are annoying. Firefox with NoScript was very helpful. But stopped using FF some time ago.
I just got the Mini, ran some speed tests with BlackMagic, absolutely blown away.