[vlovich123]

On Cloudflare, JavaScript is a JITted language, not strictly interpreted (it uses V8). Code that's seeing any amount of traffic gets lowered into native code pretty darn quick & V8's profile-guided optimizer is pretty impressive at removing JS overheads.

Rust is statically compiled but it runs under WASM. If I'm not mistaken, WASM is also typically interpreted & then JIT'ed to native code (at least it is on V8 IIRC). My guess would be that Fastly lowers it to native code AOT (or at least does a fair bit of optimization) but I'm not 100% sure.

The question is whether Rust WASM will beat CF JS and that part is less clear because the workloads you'd choose for JS vs Rust are so different. Also, these platforms aren't static so it'll be interesting to watch the competition play out as we both push the boundaries of Edge compute.

Disclaimer: I work at Cloudflare on R2. I think both teams do great technical work but I'm more excited about CF. I think our suite of Edge compute products built on top of Workers is stronger (cron triggers, unbound, durable objects & many other interesting things coming).