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Might want to try some basic HTTP caching settings for the model. This way the browser doesn't need to re-download everything every time.

This can probably be configured in the server instead of in the application.

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I think most CDNs will add reasonable cache-control headers as well - IIRC Cloudflare does this with sane defaults out of the box.

Stupid question: Is CloudFlare free for CDN purposes? Right now I'm serving everything from Github Pages. I don't expect there to be much traffic after this initial HN spike dies down, so if it isn't free, it won't be worth it for me to pay for it.

Yep[1]! I used it for my girlfriend's small business site (Wordpress) and was very happy with it.

I think CSS, JS, and images are cached - HTML is not.

1: https://www.cloudflare.com/plans/

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