Excessive total page file size — 1.4+ MB

[maxmilton]

On the initial site load with a completely cold cache, the total download file size exceeds 1.4 MB... which is extreme for a Svelte powered site!

Network waterfall: https://www.webpagetest.org/result/180811_1R_66c4b9f41273b3476c0412bc0d0e980d/1/details/#waterfall_view_step1

A quick analysis shows the service worker is fetching everything, including woff and woff2 versions of a bunch of fonts (36 fonts total ❗ ). In this case it may be better to use Google fonts to allow browsers to only load fonts which are used. Or even better yet use a system font stack to avoid the font network requests alltogether.

Some of the *worker.js files are huge too as is the codemirror bundle so there's definitely room for improvement. Maybe a lightweight code syntax highlighter would be better in the docs (e.g. https://github.com/PrismJS/prism) and just load codemirror when necessary for the REPL..