Cloudflare Workers

Cloudflare Workers runs code in V8 isolates on Cloudflare’s network, close to the visitor and without the cold-start cost of a container. Cloudflare documents first-class support for JavaScript, TypeScript, Python and Rust, and describes WebAssembly as the route for everything else, naming C, C++, Kotlin and Go as examples.

Two plans exist. The free one comes with every account by default and includes a daily request allowance with a short CPU-time budget per invocation. The paid one carries a monthly minimum and meters requests and CPU time above the included amounts. Storage, queues and databases are separate Cloudflare products a Worker calls into.

Worth knowing

The execution model is the constraint that decides whether an application fits. A Worker is scoped to a single request, with a CPU-time budget per invocation and no persistent local filesystem, so a long-lived process, local file writes and a conventional database connection pool have no place to live. The shape the platform is built for is edge logic: request rewriting, authentication checks, personalisation ahead of the cache.