Re:Concurrent JavaScript: It can work
by kllrnohj on Wednesday August 30, 2017 @02:06PM
(#15134480)
It'd also be nice if immutable objects could just be shared instead of copied or transferred instead of the current situation where they are copied and then made mutable.
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> instead of the current situation where they are copied and then made mutable.
Could you share an example? As far as I understand, Immutable JS uses something like a trie for structural sharing and avoids memory leaks.
When you send the result of Object.freeze() to or from a WebWorker the object is still copied and comes out the other side as fully mutable (aka, not frozen).
Immutable JS is orthogonal in this case. That's "just" a fancy wrapper on top of a bunch of regular, mutable JS objects that makes it look immutable. It's not truly immutable to the runtime, and has no special interaction with webworkers as a result. It gets deep copied just like any other object.