Cloudflare Workers

Cloudflare Workers is a serverless platform that runs JavaScript and WebAssembly at the edge.

Features

• Global Distribution: Runs in 300+ data centers worldwide
• V8 Engine: Fast JavaScript runtime with WebAssembly support
• KV Storage: Built-in key-value storage (TBA)
• Durable Objects: Stateful objects (TBA)
• Low Cold Start: Minimal startup latency

Project Setup

Generate a new Cloudflare Workers project:

uzumibi new --template cloudflare my-app
cd my-app

Configuration

Edit wrangler.jsonc to configure your Worker:

{
  "name": "my-app",
  "main": "src/index.js",
  "compatibility_date": "2024-01-01"
}

Local Development

# Build WASM module
cd wasm-app
cargo build --target wasm32-unknown-unknown --release
cd ..

# Copy WASM file
cp target/wasm32-unknown-unknown/release/*.wasm public/app.wasm

# Start dev server
npx wrangler dev

Deployment

npx wrangler login
npx wrangler deploy

Limitations

• CPU Time: 50ms on free plan, 50ms-30s on paid plans
• Memory: 128MB
• Request Size: 100MB
• Response Size: Unlimited

Platform-Specific Features

• Access to Cloudflare KV (TBA)
• Access to Cloudflare R2 (TBA)
• Access to Durable Objects (TBA)