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Performance · 9 min read

Cloudflare Workers vs Deno Deploy vs Rust/WASM

Affane Daylami · Fondateur · March 8, 2026

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Cloudflare Workers and Deno Deploy are two JavaScript runtimes at the edge, each with their network footprint and pricing tradeoffs. Aurabase does not depend on either of them: the native WASM mode of its Edge Functions runs Wasmtime directly in its own gateway, sandbox per module. Here's the sourced comparison — then why this third way is a game-changer for your backend.

This English text was generated automatically from the French original and has not been reviewed yet.

The essentials

Cloudflare Workers dominates in network footprint (200+ points of presence versus ~28 for Deno Deploy) and pricing. Deno Deploy compensates with built-in TypeScript tooling. Both remain JavaScript/V8 isolates. Aurabase takes a distinct path: its Edge Functions in WASM mode directly execute Rust compiled via Wasmtime, sandboxed module by module, in aura-functions — not just another JS isolate, a native runtime integrated into the heart of the backend.

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Network footprint

200+ presence points versus around 28

Cloudflare Workers relies on more than 200 points of presence around the world, compared to around 28 for Deno Deploy according to available 2026 comparisons – a difference in scale which directly affects the latency perceived by a user far from a Deno datacenter.

Deno Deploy compensates with stricter web standards compliance and integrated tooling (deployment previews, cron, cache, telemetry) that developers used to the TypeScript ecosystem find more consistent.

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Execution Limits

Allocated CPU time differs greatly depending on the plan

Cloudflare Workers caps CPU time at 50 ms on the free plan, compared to 30 seconds on the paid plans — a gap of two orders of magnitude that directly determines what your edge function can actually do without timing out.

On the edge storage side, Cloudflare offers a complete stack — D1 (SQLite), R2 (S3 compatible object), KV (optionally consistent), Durable Objects (strongly consistent) — while Deno Deploy relies on native Deno KV, simpler but less segmented by use case.

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The third way

Why Aurabase runs Wasmtime, not a JS isolate

Both Cloudflare Workers and Deno Deploy sandbox via JavaScript/V8 isolates. Aurabase takes a different route for its WASM mode: your code (Rust, or any language compilable to WebAssembly) is executed directly by Wasmtime, without depending on a third-party JavaScript runtime hosted elsewhere.

Concretely: your edge function and your dedicated Postgres database live in the same platform, with the same authentication, the same accessible RLS policies, without an additional network gateway to a separate edge provider to configure and secure independently.

Read the full comparison: Edge Functions Rust/WASM versus Cloudflare Workers and Vercel Edge

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Editorial honesty

What Cloudflare and Deno Deploy do better today

If your priority is maximum global network footprint regardless of your data backend, Cloudflare maintains a real lead in points of presence. If you want integrated TypeScript tooling without a Postgres backend to manage, Deno Deploy is still relevant.

The trade-off changes as soon as your edge function must directly query your database with the same RLS policies as the rest of your backend, without a third-party network to cross — this is exactly the terrain where Aurabase's native integration takes the advantage.

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Frequently Asked Questions

FAQs

Does Aurabase run its functions on Cloudflare Workers or Deno Deploy?+
No. The native WASM mode of the Aurabase Edge Functions runs Wasmtime directly in aura-functions, without depending on a third-party V8 isolate. The default mode is through aura-edge-runtime (Deno), an internal brick, not the public Deno Deploy service.
What is the main difference between Cloudflare Workers and Deno Deploy?+
Network footprint: more than 200 points of presence for Cloudflare Workers compared to around 28 for Deno Deploy, according to available 2026 comparisons. Deno Deploy compensates with compliance with TypeScript standards and integrated tooling.
Why Wasmtime rather than isolating JavaScript for edge functions?+
A natively compiled WebAssembly module eliminates a class of latency related to JavaScript interpretation/JIT on startup. It's a different sandboxing choice, not automatically faster without measurement — see our dedicated WebAssembly cold start article for the nuances.

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