I usually think of JavaScript as the biggest source of performance issues and then overly large images as a nice low-hanging fruit, but in between we have fonts. It is rare to see a new site that uses just system fonts, so the downloading and display of one or more web fonts is a common performance issue. On my journey through font loading and system vs. web fonts, I ended up creating a whole new staging/test site for myself and even wrote about it as the first piece in this issue.