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Why are Cloudflare Workers limited to languages that compile to Wasm? Can't they use a container of some sort to isolate the code? Many languages can be compile

Why are Cloudflare Workers limited to languages that compile to Wasm? Can't they use a container of some sort to isolate the code? Many languages can be compiled to Wasm but many times is quirky.

uzername 3y ago
The cloudflare workers run as "isolates". I think of them as "browser tabs." This post helps explain better" https://blog.cloudflare.com/cloud-computing-without-containers/ https://blog.cloudflare.com/cloud-computing-without-containe...
re-thc 3y ago
No containers. It’s a v8 isolate ie Chrome and Node’s JS engine. Wasm come included.
sofixa 3y ago
Containers have isolation problems thus requiring a further layer of isolation (microVMs like Firecracker by AWS), which slows startup times. CloudFlare Workers are mostly intended for Edge-ish scenarios so they need to have fast startup times.