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They originally had (and seem to still have) the same JS runtime at the edge to give you a smart CDN/reverse proxy.

They just updated it from being JS only to being able to run any Docker image. Cloudflare gives you a persistent key/value store and Fly provides a non-persistent Redis cache.

You don’t have to move your entire app but there are plenty of use-cases where you can move more logic to the edge.

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We’re moving the JS apps to just run on Deno containers. Deno is fabulous.

This is the most intriguing thing for me, perhaps second only to the fact that you guys are working with Rust. I have followed Deno since it was announced and it has been fascinating to watch it evolve. How much Deno code do you all have working in production right now?

Only a little. It works very well, once we port our edge js library (https://github.com/superfly/edge) to Deno we will move over some things handling hundreds of millions of requests per day.

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