The way I understand it, it's a JS interpreter (SpiderMonkey) compiled to WASM that supports the Service Worker API[1]. So you basically get an unlimited numbe

The way I understand it, it's a JS interpreter (SpiderMonkey) compiled to WASM that supports the Service Worker API[1]. So you basically get an unlimited number of sandboxed JS environments, that you can spawn very quickly like browser tabs. Unlike Node.js with which you'd have to do a cold start every time. And on top of that, there's another layer of sandboxing thanks to WASM, but that's just because they already run everything on WASM. So to summarize, it gives you speed and process isolation plus a standard API. [1] https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API https://developer.mozilla.org/en-US/docs/Web/API/Service_Wor...