Better Shared Memory handling

[Autumnlight02]

What is the problem this feature would solve?

The Issue is that currently worker threads can be slow to work with if you need to always send over all the data from one thread to another, this is a major issue with Javascript as Iv'e seen.

What is the feature you are proposing to solve the problem?

Explained it here: WICG/proposals#170
Basically It would allow you to declare a RSet and RMap (etc) which are only writable from one thread but readable by all workers in realtime. This could allow many ressources to be more easily shared where workers are message responders and processecers and the main thread only managed the shared data between all of them.

What alternatives have you considered?

A different language? Shared buffers and atomics aint it.