I feel like this title is misleading compared to the original article. (cc @dang) Fly.io without cold starts (which is a one-line configuration change) is 2x faster than Cloudflare Workers.
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On the other hand, if you want lowest possible latency, and the ability to run normal Linux applications (rather than being confined to the Cloudflare Worker limits, e.g. maximum worker size is 10MB), something like Fly.io is pretty nice: it's even lower latency than Cloudflare assuming you keep the machines running, and scaling up/down is relatively quick although not something you'd generally be doing every few seconds.