The website is a blog of four static pages. The styling of the pages is simple, clean, and effective. There's no need for any JavaScript or a CSS framework; the CSS could be entirely handwritten in probably 100 lines. If the image is 71 kB, there's no reason for the total download for the home page to exceed 80 kB.

What even is https://www.calvinbarker.com/_next/static/chunks/webpack-79c... ?

Seems like it can be cut down to 16k (3 of which are the favicon!).