Feature-Request: allow to iterate over WeakSet / WeakMap

[Boris Zbarsky]

On 7/13/16 10:18 AM, Michael Kriegel wrote:
> But shouldn't it be predictable, whether there
> are still "non-weak" references to an object?

Maybe.  The GC may include a machine stack scanner to root things 
referenced on the stack, which can give false positives depending on 
what integers happen to be hanging out on the stack.

> does NOT depend on, whether the object has actually been gc'ed, but whether the object does
> have "non-weak" references to it.

Determining this basically requires running a full gc, no?

> I am not sure, which kinds of garbage collectors the implementations of
> ECMAScript typically use. If they used a reference counter

They don't.

-Boris