Similar, but less general. Serializable continuations can be saved to disk. You can reinstate a completed continuation (eg. go back from the final page. After

Similar, but less general. Serializable continuations can be saved to disk. You can reinstate a completed continuation (eg. go back from the final page. After clicking the link again, the page completes again. Or try clicking the link in several tabs; the page concurrently completes several times as you expect.) Generators make this pattern impossible; Continuations give it to you for free. Second, by being saved on disk, they aren't crammed up in the event loop so they aren't a RAM leak. Racket even provides a way of having the client store all state if you wish; such "stateless" continuations have no memory or disk overhead on a long-running server and never expire until you change your site's source code.