Fastly Compute

Fastly Compute@Edge runs WebAssembly workloads at the edge using the WASI interface.

Features

• Global CDN: Runs on Fastly’s global edge network
• WASI Support: Standard WebAssembly System Interface
• High Performance: Near-native execution speed
• Edge Dictionary: Configuration storage (TBA)
• KV Store: Key-value storage (TBA)

Project Setup

Generate a new Fastly Compute project:

uzumibi new --template fastly my-app
cd my-app

Configuration

Edit fastly.toml:

name = "my-app"
description = "Uzumibi application on Fastly Compute"
authors = ["Your Name <your.email@example.com>"]
language = "rust"

[local_server]
  [local_server.backends]
    [local_server.backends.backend_name]
      url = "http://httpbin.org"

Local Development

# Build
cargo build --target wasm32-wasi --release

# Run locally
fastly compute serve

Deployment

fastly compute deploy

Limitations

• Execution Time: Up to 60 seconds
• Memory: Configurable, typically 128MB-512MB
• Request Size: 8KB headers, unlimited body
• Response Size: Unlimited

Platform-Specific Features

• Access to Fastly KV Store (TBA)
• Access to Edge Dictionary (TBA)
• Backend requests configuration (TBA)