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Lack of update is a show stopper. In general I would expect Immutable JS to trounce anything via Object.freeze with respect to performance. Real hash maps and s

Lack of update is a show stopper. In general I would expect Immutable JS to trounce anything via Object.freeze with respect to performance. Real hash maps and sets are useful to organize programs - the semantics of Object.freeze on ES6 Map and Set are unclear and still suffer from above problems. Again Immutable JS has a big advantage. In the context of building real applications with immutable data structures and a library like React that makes them easy to integrate - many of your concerns don't apply at all.

gcanti 12y ago
> Lack of update is a show stopper Well, it's quite easy to write something like Facebook Immutability Helpers [1]. As you correctly stated, it really depends on your own use case and performance issues. I'll try some perf experiment with [1] or something similar to see what comes out. [1]: http://facebook.github.io/react/docs/update.html http://facebook.github.io/react/docs/update.html