René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[WASM] How would a VirtualMachine class work for binding to JS?","articleBody":"Given that a `VirtualMachine` could potentially take up a lot of memory, what would be the smartest way to make a JS class to manage it? The `pyEval` function is sufficient for simple things, but it might be desirable to persist the context over, e.g. for a REPL.\r\n\r\nI see two or three ways to do this:\r\n- Hold created `VirtualMachines` in a global HashMap by randomly generated IDs, and have a `.destroy()` method on the JS class that has to be called or risk a memory leak.\r\n- Only allow one `VirtualMachine` per JS context, held in a global variable, initialized at load.\r\n- Implement a way for the entire Python context to be serialized (probably not feasible at the moment, nor necessarily worth the time).\r\n\r\nI considered some stuff with maybe JS `WeakSet`s or `WeakMap`s (that take an object as a key but don't prevent it or its value from being garbage-collected), but I don't think that would be able to do anything.","author":{"url":"https://github.com/coolreader18","@type":"Person","name":"coolreader18"},"datePublished":"2019-01-28T02:14:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/262/RustPython/issues/262"}