Cloudflare Workers

Overview

Cloudflare Workers is a serverless platform for running JavaScript code at the edge, close to users, for tasks like API routing, authentication, and content transformation.

It leverages Cloudflare's global network for low-latency execution.

When to use

Use Cloudflare Workers when:

Building edge-side rendering or API proxies.
Needing global distribution without server management.
Handling custom logic for web traffic (e.g., A/B testing).
Integrating with Cloudflare's CDN and security features.

Pros

Sub-millisecond cold starts and edge proximity.
Free tier with generous request limits.
V8 isolates for secure, isolated execution.
Easy deployment via Wrangler CLI.
Integrates with KV storage and Durable Objects.

Cons

10ms CPU time limit on free plan; bursts cost extra.
Limited to JavaScript/WebAssembly runtime.
Debugging distributed code can be challenging.
Vendor lock-in to Cloudflare ecosystem.
No persistent state without additional services.

Notes

Note: Use Workers for KV for simple key-value caching at edge.

Monitor with Cloudflare Analytics for performance.

Test locally with miniflare for faster iteration.

Metadata

Category: Platforms
Created: 9 Mar 2026
ID: 161581c8-dd77-41f0-8d63-d0f7aba926f7