The commenter says pre-rendered/server-side-rendered mathematics (via katex) is great - I’ve found the opposite. It’s probably great if you have an article with one or two equations. On the other hand, if you have an article which uses mathematics pervasively, like many pure mathematics articles, it quickly becomes far more space efficient to render the mathematics on the client side. You can quickly get 200kB+ pages by pre-rendering.
My experience with dynamically rendered math has been the opposite: if you have lots of equations to render, it inevitably takes some milliseconds to render, which makes the whole content move around and shake as rendering takes places.
Of course, if the page uses more symbols in various sizes, then a few more fonts files (.woff2) need to be pulled in which case the weight of KaTeX would increase a bit too. Each font file weighs between 4 kB and 28 kB.
