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I've been developing a small self-contained web app to serve as a scoreboard for roller derby. It consists of a server written in Rust that mostly serves a bunch of static pages and javascript files, as well as a JSON API that the javascript calls into to provide the dynamism. Thus far, serde-json has been an amazingly low-friction way to design JSON APIs, and Rocket has been a relatively convenient way to organize web apps. The closest competitor to my app is written in Java and needs about 200 MB of memory at steady state just on the server. My version runs with an RSS of about 3 MB and considerably better performance.

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